diff --git a/Copter/mgh-quad.scad b/Copter/mgh-quad.scad
index 1efc27f..adf4706 100644
--- a/Copter/mgh-quad.scad
+++ b/Copter/mgh-quad.scad
@@ -9,9 +9,12 @@ motorZ = 22;
 shellThickness = 3.5;
 armW = 6;
 m2mDist = 100;
-batteryWidth = 30.5;
+batteryWidth = 35.0;
 quadThickness = 5;
 
+usbWidth = 12;
+usbOff = 0;
+
 propLength = 70;
 
 module makeArmHollow() {
@@ -50,8 +53,13 @@ difference() {
                         cube([m2mDist/2,armW,armW]);
                 cylinder(h = motorZ/2, r=motorD/2 + shellThickness/2);
                 sphere(r=motorD/2 + shellThickness/2);
+                
                 //prop preview
-                %rotate([0,0,45]) cylinder(d=propLength, h=5);
+                //%rotate([0,0,45]) cylinder(d=propLength, h=5);
+                
+                // print helper discs ("brim")
+                translate([0, 0, 10.8])
+                    cylinder(h=0.2, d=40);
             }
         }
         
@@ -70,6 +78,9 @@ difference() {
             }
     }
     
+    translate([usbOff, batteryWidth / 2 - 2, -1])
+        cube([usbWidth, 5, 10]);
+    
     //create each arms hollow area
     rotate([0,0,45]){
             rotate([0,0,90]) makeArmHollow();
diff --git a/doc/arduino-pins.txt b/doc/arduino-pins.txt
new file mode 100644
index 0000000..6f8fe0f
--- /dev/null
+++ b/doc/arduino-pins.txt
@@ -0,0 +1,9 @@
+Arduino Pinbelegung:
+
+Display I2C: SDA & SCL: D2 & D3
+Interrupt Pints: INT2 & INT3: D0 & D1
+Joysticks & Schalter: A0, A1, A2, A3, A8, A9
+Spannungsteiler: A10
+SPI: MOSI, MISO, CLK, CS: D14, D15, D16, D7
+CC2500: PA & LNA: D4 & D5
+Buzzer: D6
diff --git a/doc/bf_3.5_conf.txt b/doc/bf_3.5_conf.txt
new file mode 100644
index 0000000..10b6d23
--- /dev/null
+++ b/doc/bf_3.5_conf.txt
@@ -0,0 +1,572 @@
+# dump
+# Betaflight / OMNIBUS (OMNI) 3.5.0 Aug 14 2018 / 03:49:05 (1d710afd7) MSP API: 1.40
+
+name -
+resource BEEPER 1 C15
+resource MOTOR 1 A03
+resource MOTOR 2 A02
+resource MOTOR 3 B08
+resource MOTOR 4 B09
+resource MOTOR 5 B07
+resource MOTOR 6 B06
+resource MOTOR 7 NONE
+resource MOTOR 8 NONE
+resource SERVO 1 NONE
+resource SERVO 2 NONE
+resource SERVO 3 NONE
+resource SERVO 4 NONE
+resource SERVO 5 NONE
+resource SERVO 6 NONE
+resource SERVO 7 NONE
+resource SERVO 8 NONE
+resource PPM 1 B04
+resource SERIAL_TX 1 A09
+resource SERIAL_TX 2 A14
+resource SERIAL_TX 3 B10
+resource SERIAL_TX 4 NONE
+resource SERIAL_TX 5 NONE
+resource SERIAL_TX 6 NONE
+resource SERIAL_TX 7 NONE
+resource SERIAL_TX 8 NONE
+resource SERIAL_TX 9 NONE
+resource SERIAL_TX 10 NONE
+resource SERIAL_TX 11 NONE
+resource SERIAL_TX 12 NONE
+resource SERIAL_RX 1 A10
+resource SERIAL_RX 2 A15
+resource SERIAL_RX 3 B11
+resource SERIAL_RX 4 NONE
+resource SERIAL_RX 5 NONE
+resource SERIAL_RX 6 NONE
+resource SERIAL_RX 7 NONE
+resource SERIAL_RX 8 NONE
+resource SERIAL_RX 9 NONE
+resource SERIAL_RX 10 NONE
+resource SERIAL_RX 11 NONE
+resource SERIAL_RX 12 NONE
+resource I2C_SCL 1 NONE
+resource I2C_SCL 2 NONE
+resource I2C_SDA 1 NONE
+resource I2C_SDA 2 NONE
+resource LED 1 B03
+resource LED 2 NONE
+resource LED 3 NONE
+resource RX_BIND 1 NONE
+resource RX_BIND_PLUG 1 NONE
+resource TRANSPONDER 1 A08
+resource SPI_SCK 1 A05
+resource SPI_SCK 2 B13
+resource SPI_SCK 3 NONE
+resource SPI_MISO 1 A06
+resource SPI_MISO 2 B14
+resource SPI_MISO 3 NONE
+resource SPI_MOSI 1 A07
+resource SPI_MOSI 2 B15
+resource SPI_MOSI 3 NONE
+resource ESCSERIAL 1 B04
+resource CAMERA_CONTROL 1 NONE
+resource ADC_BATT 1 A00
+resource ADC_RSSI 1 NONE
+resource ADC_CURR 1 A01
+resource ADC_EXT 1 NONE
+resource BARO_CS 1 A13
+resource SDCARD_CS 1 B12
+resource SDCARD_DETECT 1 C14
+resource OSD_CS 1 B01
+resource SPI_PREINIT_IPU 1 A04
+resource SPI_PREINIT_IPU 2 B12
+resource SPI_PREINIT_IPU 3 A13
+resource SPI_PREINIT_IPU 4 B01
+resource SPI_PREINIT_IPU 5 NONE
+resource SPI_PREINIT_IPU 6 NONE
+resource SPI_PREINIT_IPU 7 NONE
+resource SPI_PREINIT_IPU 8 NONE
+resource SPI_PREINIT_IPU 9 NONE
+resource SPI_PREINIT_IPU 10 NONE
+resource SPI_PREINIT_IPU 11 NONE
+resource SPI_PREINIT_OPU 1 NONE
+resource SPI_PREINIT_OPU 2 NONE
+mixer QUADX
+
+mmix reset
+
+servo 0 1000 2000 1500 100 -1
+servo 1 1000 2000 1500 100 -1
+servo 2 1000 2000 1500 100 -1
+servo 3 1000 2000 1500 100 -1
+servo 4 1000 2000 1500 100 -1
+servo 5 1000 2000 1500 100 -1
+servo 6 1000 2000 1500 100 -1
+servo 7 1000 2000 1500 100 -1
+smix reset
+
+
+feature -RX_PPM
+feature -INFLIGHT_ACC_CAL
+feature -RX_SERIAL
+feature -MOTOR_STOP
+feature -SERVO_TILT
+feature -SOFTSERIAL
+feature -GPS
+feature -RANGEFINDER
+feature -TELEMETRY
+feature -3D
+feature -RX_PARALLEL_PWM
+feature -RX_MSP
+feature -RSSI_ADC
+feature -LED_STRIP
+feature -DISPLAY
+feature -OSD
+feature -CHANNEL_FORWARDING
+feature -TRANSPONDER
+feature -AIRMODE
+feature -RX_SPI
+feature -SOFTSPI
+feature -ESC_SENSOR
+feature -ANTI_GRAVITY
+feature -DYNAMIC_FILTER
+feature RX_SERIAL
+feature MOTOR_STOP
+feature OSD
+feature ANTI_GRAVITY
+feature DYNAMIC_FILTER
+beeper GYRO_CALIBRATED
+beeper RX_LOST
+beeper RX_LOST_LANDING
+beeper DISARMING
+beeper ARMING
+beeper ARMING_GPS_FIX
+beeper BAT_CRIT_LOW
+beeper BAT_LOW
+beeper GPS_STATUS
+beeper RX_SET
+beeper ACC_CALIBRATION
+beeper ACC_CALIBRATION_FAIL
+beeper READY_BEEP
+beeper MULTI_BEEPS
+beeper DISARM_REPEAT
+beeper ARMED
+beeper SYSTEM_INIT
+beeper ON_USB
+beeper BLACKBOX_ERASE
+beeper CRASH FLIP
+beeper CAM_CONNECTION_OPEN
+beeper CAM_CONNECTION_CLOSED
+beeper RC_SMOOTHING_INIT_FAIL
+beacon GYRO_CALIBRATED
+beacon -RX_LOST
+beacon RX_LOST_LANDING
+beacon DISARMING
+beacon ARMING
+beacon ARMING_GPS_FIX
+beacon BAT_CRIT_LOW
+beacon BAT_LOW
+beacon GPS_STATUS
+beacon -RX_SET
+beacon ACC_CALIBRATION
+beacon ACC_CALIBRATION_FAIL
+beacon READY_BEEP
+beacon MULTI_BEEPS
+beacon DISARM_REPEAT
+beacon ARMED
+beacon SYSTEM_INIT
+beacon ON_USB
+beacon BLACKBOX_ERASE
+beacon CRASH FLIP
+beacon CAM_CONNECTION_OPEN
+beacon CAM_CONNECTION_CLOSED
+beacon RC_SMOOTHING_INIT_FAIL
+map AETR1234
+serial 20 1 115200 57600 0 115200
+serial 0 0 115200 57600 0 115200
+serial 1 0 115200 57600 0 115200
+serial 2 64 115200 57600 0 115200
+aux 0 0 0 1500 2100 0 0
+aux 1 1 1 1700 2100 0 0
+aux 2 2 1 1300 1700 0 0
+aux 3 0 0 900 900 0 0
+aux 4 0 0 900 900 0 0
+aux 5 0 0 900 900 0 0
+aux 6 0 0 900 900 0 0
+aux 7 0 0 900 900 0 0
+aux 8 0 0 900 900 0 0
+aux 9 0 0 900 900 0 0
+aux 10 0 0 900 900 0 0
+aux 11 0 0 900 900 0 0
+aux 12 0 0 900 900 0 0
+aux 13 0 0 900 900 0 0
+aux 14 0 0 900 900 0 0
+aux 15 0 0 900 900 0 0
+aux 16 0 0 900 900 0 0
+aux 17 0 0 900 900 0 0
+aux 18 0 0 900 900 0 0
+aux 19 0 0 900 900 0 0
+adjrange 0 0 0 900 900 0 0 0 0
+adjrange 1 0 0 900 900 0 0 0 0
+adjrange 2 0 0 900 900 0 0 0 0
+adjrange 3 0 0 900 900 0 0 0 0
+adjrange 4 0 0 900 900 0 0 0 0
+adjrange 5 0 0 900 900 0 0 0 0
+adjrange 6 0 0 900 900 0 0 0 0
+adjrange 7 0 0 900 900 0 0 0 0
+adjrange 8 0 0 900 900 0 0 0 0
+adjrange 9 0 0 900 900 0 0 0 0
+adjrange 10 0 0 900 900 0 0 0 0
+adjrange 11 0 0 900 900 0 0 0 0
+adjrange 12 0 0 900 900 0 0 0 0
+adjrange 13 0 0 900 900 0 0 0 0
+adjrange 14 0 0 900 900 0 0 0 0
+rxrange 0 1007 2027
+rxrange 1 1007 2027
+rxrange 2 1007 2027
+rxrange 3 1007 2027
+vtx 0 0 0 0 900 900
+vtx 1 0 0 0 900 900
+vtx 2 0 0 0 900 900
+vtx 3 0 0 0 900 900
+vtx 4 0 0 0 900 900
+vtx 5 0 0 0 900 900
+vtx 6 0 0 0 900 900
+vtx 7 0 0 0 900 900
+vtx 8 0 0 0 900 900
+vtx 9 0 0 0 900 900
+rxfail 0 a
+rxfail 1 a
+rxfail 2 a
+rxfail 3 a
+rxfail 4 h
+rxfail 5 h
+rxfail 6 h
+rxfail 7 h
+rxfail 8 h
+rxfail 9 h
+rxfail 10 h
+rxfail 11 h
+rxfail 12 h
+rxfail 13 h
+rxfail 14 h
+rxfail 15 h
+rxfail 16 h
+rxfail 17 h
+set align_gyro = DEFAULT
+set gyro_hardware_lpf = NORMAL
+set gyro_sync_denom = 1
+set gyro_lowpass_type = PT1
+set gyro_lowpass_hz = 100
+set gyro_lowpass2_type = PT1
+set gyro_lowpass2_hz = 300
+set gyro_notch1_hz = 0
+set gyro_notch1_cutoff = 0
+set gyro_notch2_hz = 0
+set gyro_notch2_cutoff = 0
+set gyro_calib_duration = 125
+set gyro_calib_noise_limit = 48
+set gyro_offset_yaw = 0
+set yaw_spin_recovery = ON
+set yaw_spin_threshold = 1950
+set dyn_notch_quality = 70
+set dyn_notch_width_percent = 50
+set align_acc = DEFAULT
+set acc_hardware = AUTO
+set acc_lpf_hz = 10
+set acc_trim_pitch = 0
+set acc_trim_roll = 0
+set acc_calibration = 47,1,-4334
+set baro_bustype = SPI
+set baro_spi_device = 1
+set baro_i2c_device = 0
+set baro_i2c_address = 0
+set baro_hardware = AUTO
+set baro_tab_size = 21
+set baro_noise_lpf = 600
+set baro_cf_vel = 985
+set baro_cf_alt = 965
+set mid_rc = 1500
+set min_check = 1050
+set max_check = 1900
+set rssi_channel = 0
+set rssi_src_frame_errors = OFF
+set rssi_scale = 100
+set rssi_offset = 0
+set rssi_invert = OFF
+set rc_interp = AUTO
+set rc_interp_ch = RPYT
+set rc_interp_int = 19
+set fpv_mix_degrees = 0
+set max_aux_channels = 14
+set serialrx_provider = SBUS
+set serialrx_inverted = OFF
+set spektrum_sat_bind = 0
+set spektrum_sat_bind_autoreset = ON
+set airmode_start_throttle_percent = 32
+set rx_min_usec = 885
+set rx_max_usec = 2115
+set serialrx_halfduplex = OFF
+set blackbox_p_ratio = 32
+set blackbox_device = SDCARD
+set blackbox_record_acc = ON
+set blackbox_mode = NORMAL
+set min_throttle = 1000
+set max_throttle = 2000
+set min_command = 1000
+set dshot_idle_value = 450
+set use_unsynced_pwm = ON
+set motor_pwm_protocol = BRUSHED
+set motor_pwm_rate = 16000
+set motor_pwm_inversion = OFF
+set motor_poles = 14
+set thr_corr_value = 0
+set thr_corr_angle = 800
+set failsafe_delay = 4
+set failsafe_off_delay = 10
+set failsafe_throttle = 1000
+set failsafe_switch_mode = STAGE1
+set failsafe_throttle_low_delay = 100
+set failsafe_procedure = DROP
+set align_board_roll = 180
+set align_board_pitch = 0
+set align_board_yaw = 0
+set gimbal_mode = NORMAL
+set bat_capacity = 0
+set vbat_max_cell_voltage = 43
+set vbat_full_cell_voltage = 41
+set vbat_min_cell_voltage = 33
+set vbat_warning_cell_voltage = 35
+set vbat_hysteresis = 1
+set current_meter = ADC
+set battery_meter = ADC
+set vbat_detect_cell_voltage = 30
+set use_vbat_alerts = ON
+set use_cbat_alerts = OFF
+set cbat_alert_percent = 10
+set vbat_cutoff_percent = 100
+set vbat_scale = 110
+set vbat_divider = 10
+set vbat_multiplier = 1
+set ibata_scale = 400
+set ibata_offset = 0
+set ibatv_scale = 0
+set ibatv_offset = 0
+set beeper_inversion = ON
+set beeper_od = OFF
+set beeper_frequency = 0
+set beeper_dshot_beacon_tone = 1
+set yaw_motors_reversed = ON
+set crashflip_motor_percent = 0
+set 3d_deadband_low = 1406
+set 3d_deadband_high = 1514
+set 3d_neutral = 1460
+set 3d_deadband_throttle = 50
+set 3d_limit_low = 1000
+set 3d_limit_high = 2000
+set 3d_switched_mode = OFF
+set servo_center_pulse = 1500
+set servo_pwm_rate = 50
+set servo_lowpass_hz = 0
+set tri_unarmed_servo = ON
+set channel_forwarding_start = 4
+set reboot_character = 82
+set serial_update_rate_hz = 100
+set accxy_deadband = 40
+set accz_deadband = 40
+set acc_unarmedcal = ON
+set imu_dcm_kp = 2500
+set imu_dcm_ki = 0
+set small_angle = 45
+set auto_disarm_delay = 5
+set gyro_cal_on_first_arm = OFF
+set deadband = 3
+set yaw_deadband = 3
+set yaw_control_reversed = OFF
+set pid_process_denom = 4
+set runaway_takeoff_prevention = ON
+set runaway_takeoff_deactivate_delay = 500
+set runaway_takeoff_deactivate_throttle_percent = 25
+set tlm_inverted = OFF
+set tlm_halfduplex = ON
+set frsky_vfas_precision = 0
+set hott_alarm_int = 5
+set pid_in_tlm = OFF
+set report_cell_voltage = OFF
+set smartport_use_extra_sensors = OFF
+set sdcard_dma = OFF
+set osd_units = METRIC
+set osd_warn_arming_disable = ON
+set osd_warn_batt_not_full = ON
+set osd_warn_batt_warning = ON
+set osd_warn_batt_critical = ON
+set osd_warn_visual_beeper = ON
+set osd_warn_crash_flip = ON
+set osd_warn_esc_fail = ON
+set osd_rssi_alarm = 20
+set osd_cap_alarm = 2200
+set osd_alt_alarm = 100
+set osd_esc_temp_alarm = -128
+set osd_esc_rpm_alarm = -1
+set osd_esc_current_alarm = -1
+set osd_ah_max_pit = 20
+set osd_ah_max_rol = 40
+set osd_tim1 = 2560
+set osd_tim2 = 2561
+set osd_vbat_pos = 234
+set osd_rssi_pos = 234
+set osd_tim_1_pos = 234
+set osd_tim_2_pos = 234
+set osd_remaining_time_estimate_pos = 234
+set osd_flymode_pos = 234
+set osd_anti_gravity_pos = 234
+set osd_g_force_pos = 234
+set osd_throttle_pos = 234
+set osd_vtx_channel_pos = 234
+set osd_crosshairs_pos = 205
+set osd_ah_sbar_pos = 206
+set osd_ah_pos = 78
+set osd_current_pos = 234
+set osd_mah_drawn_pos = 234
+set osd_craft_name_pos = 234
+set osd_gps_speed_pos = 234
+set osd_gps_lon_pos = 234
+set osd_gps_lat_pos = 234
+set osd_gps_sats_pos = 234
+set osd_home_dir_pos = 234
+set osd_home_dist_pos = 234
+set osd_compass_bar_pos = 234
+set osd_altitude_pos = 234
+set osd_pid_roll_pos = 234
+set osd_pid_pitch_pos = 234
+set osd_pid_yaw_pos = 234
+set osd_debug_pos = 234
+set osd_power_pos = 234
+set osd_pidrate_profile_pos = 234
+set osd_warnings_pos = 2377
+set osd_avg_cell_voltage_pos = 234
+set osd_pit_ang_pos = 234
+set osd_rol_ang_pos = 234
+set osd_battery_usage_pos = 234
+set osd_disarmed_pos = 234
+set osd_nheading_pos = 234
+set osd_nvario_pos = 234
+set osd_esc_tmp_pos = 234
+set osd_esc_rpm_pos = 234
+set osd_rtc_date_time_pos = 234
+set osd_adjustment_range_pos = 234
+set osd_stat_rtc_date_time = OFF
+set osd_stat_tim_1 = OFF
+set osd_stat_tim_2 = ON
+set osd_stat_max_spd = ON
+set osd_stat_max_dist = OFF
+set osd_stat_min_batt = ON
+set osd_stat_endbatt = OFF
+set osd_stat_battery = OFF
+set osd_stat_min_rssi = ON
+set osd_stat_max_curr = ON
+set osd_stat_used_mah = ON
+set osd_stat_max_alt = OFF
+set osd_stat_bbox = ON
+set osd_stat_bb_no = ON
+set task_statistics = ON
+set debug_mode = NONE
+set rate_6pos_switch = OFF
+set pwr_on_arm_grace = 5
+set vtx_band = 4
+set vtx_channel = 1
+set vtx_power = 1
+set vtx_low_power_disarm = OFF
+set vtx_freq = 5740
+set vtx_pit_mode_freq = 0
+set vtx_halfduplex = ON
+set vcd_video_system = AUTO
+set vcd_h_offset = 0
+set vcd_v_offset = 0
+set max7456_clock = DEFAULT
+set max7456_spi_bus = 1
+set displayport_msp_col_adjust = 0
+set displayport_msp_row_adjust = 0
+set displayport_max7456_col_adjust = 0
+set displayport_max7456_row_adjust = 0
+set displayport_max7456_inv = OFF
+set displayport_max7456_blk = 0
+set displayport_max7456_wht = 2
+set esc_sensor_halfduplex = OFF
+set esc_sensor_current_offset = 0
+set led_inversion = 0
+set camera_control_mode = HARDWARE_PWM
+set camera_control_ref_voltage = 330
+set camera_control_key_delay = 180
+set camera_control_internal_resistance = 470
+set camera_control_inverted = OFF
+set rcdevice_init_dev_attempts = 4
+set rcdevice_init_dev_attempt_interval = 1000
+profile 0
+
+set dterm_lowpass_type = PT1
+set dterm_lowpass_hz = 100
+set dterm_lowpass2_hz = 200
+set dterm_notch_hz = 0
+set dterm_notch_cutoff = 160
+set vbat_pid_gain = OFF
+set pid_at_min_throttle = ON
+set anti_gravity_mode = SMOOTH
+set anti_gravity_threshold = 250
+set anti_gravity_gain = 5000
+set feedforward_transition = 0
+set acc_limit_yaw = 100
+set acc_limit = 0
+set crash_dthreshold = 50
+set crash_gthreshold = 400
+set crash_setpoint_threshold = 350
+set crash_time = 500
+set crash_delay = 0
+set crash_recovery_angle = 10
+set crash_recovery_rate = 100
+set crash_limit_yaw = 200
+set crash_recovery = OFF
+set iterm_rotation = ON
+set smart_feedforward = OFF
+set iterm_windup = 40
+set iterm_limit = 150
+set pidsum_limit = 500
+set pidsum_limit_yaw = 400
+set yaw_lowpass_hz = 0
+set throttle_boost = 5
+set throttle_boost_cutoff = 15
+set acro_trainer_angle_limit = 20
+set acro_trainer_lookahead_ms = 50
+set acro_trainer_debug_axis = ROLL
+set acro_trainer_gain = 75
+set p_pitch = 50
+set i_pitch = 50
+set d_pitch = 27
+set f_pitch = 60
+set p_roll = 46
+set i_roll = 45
+set d_roll = 25
+set f_roll = 60
+set p_yaw = 65
+set i_yaw = 45
+set d_yaw = 0
+set f_yaw = 60
+set p_level = 50
+set i_level = 50
+set d_level = 75
+set level_limit = 55
+set horizon_tilt_effect = 75
+set horizon_tilt_expert_mode = OFF
+rateprofile 0
+
+set thr_mid = 50
+set thr_expo = 0
+set rates_type = BETAFLIGHT
+set roll_rc_rate = 100
+set pitch_rc_rate = 100
+set yaw_rc_rate = 100
+set roll_expo = 0
+set pitch_expo = 0
+set yaw_expo = 0
+set roll_srate = 70
+set pitch_srate = 70
+set yaw_srate = 70
+set tpa_rate = 10
+set tpa_breakpoint = 1650
+set throttle_limit_type = OFF
+set throttle_limit_percent = 100
diff --git a/doc/frame.txt b/doc/frame.txt
new file mode 100644
index 0000000..55e302d
--- /dev/null
+++ b/doc/frame.txt
@@ -0,0 +1,6 @@
+Frame Requirements:
+
+Breite FC: 20mm / 21mm mit Luft für Löt-Noobs
+Breite Rx: 13mm / 14mm mit Luft
+
+--> Breite 35mm