Please note that if the Beta75X is used the lastest version of F4 AIO 12A FC, you should flash following CLI.
Here is the pic of the differences among three versions of FC.
This Cli DIFF can be used for Betaflight_MATEKF411_3.5.3 on Beta75X 3S whoop (For F4 AIO 12A FC V3.0)
name X series feature LED_STRIP beacon RX_LOST beacon RX_SET map TAER1234 serial 0 2048 115200 57600 0 115200 serial 1 64 115200 57600 0 115200 led 0 0,0::A:0 led 1 1,0::A:0 led 2 2,0::L:0 led 3 3,0::L:0 mode_color 6 0 2 aux 0 0 0 1700 2100 0 0 aux 1 1 1 1300 1700 0 0 aux 2 2 1 1700 2100 0 0 aux 3 28 2 900 1300 0 0 aux 4 35 2 1700 2100 0 0 set acc_calibration = -67,-25,-324 set baro_hardware = NONE set rssi_channel = 16 set serialrx_provider = SBUS set motor_pwm_protocol = DSHOT600 set vbat_min_cell_voltage = 32 set vbat_warning_cell_voltage = 34 set ibata_scale = 580 set ibata_offset = 100 set yaw_motors_reversed = ON set small_angle = 180 set pid_process_denom = 1 set osd_warn_batt_warning = OFF set osd_warn_core_temp = OFF set osd_vbat_pos = 2433 set osd_rssi_pos = 2337 set osd_tim_2_pos = 2455 set osd_flymode_pos = 2425 set osd_throttle_pos = 2369 set osd_crosshairs_pos = 2253 set osd_current_pos = 2400 set osd_mah_drawn_pos = 2392 set osd_craft_name_pos = 2442 set vcd_video_system = NTSC set iterm_relax = RPY set iterm_limit = 500 set pidsum_limit = 1000 set pidsum_limit_yaw = 1000 set p_pitch = 52 set i_pitch = 45 set d_pitch = 31 set f_pitch = 71 set p_roll = 52 set i_roll = 51 set d_roll = 31 set f_roll = 71 set p_yaw = 78 set i_yaw = 57 set f_yaw = 75 save