4/10/21: i scaled the throttle down at 80% to slow it down for my yard. now it feels like 1s 1202.5/1302.x 11250kv but with a bit more speed, power and weight. and it feels good.

it's similar to happymodel Crux3, but with a bit more power.

43gram,
frame: 2mm thick is ok, but if you do fast flips and rolls a lot, or crash a lot, then 3mm is better.
2s 27gram - 31gram batteries ( 450mah - 650mah )
Apex 1202.6 6666kv
gemfan 3018
crazybee f4 V3 10a esc ( don't use 5a esc with this build )

Betaflight 4.3

===================================
esc settings: BLheli_M,
start-up power: 1.25 ( try at 1.00 first )
motor timing/ demag comp: high/medium high

=================================
set dshot_idle_value = 500
set dshot_bidir = ON
set motor_pwm_protocol = DSHOT300
set motor_poles = 12
set gyro_lowpass_hz = 0
set gyro_lowpass2_hz = 0
set dyn_notch_bandwidth_hz = 45
set dyn_notch_min_hz = 90
set dyn_notch_max_hz = 350
set dyn_notch_count = 1
set dyn_lpf_gyro_min_hz = 0
set gyro_rpm_notch_harmonics = 2
set thrust_linear = 50

profile 0

set dyn_lpf_dterm_min_hz = 91
set dyn_lpf_dterm_max_hz = 221
set dterm_lowpass2_hz = 195
set feedforward_transition = 100
set iterm_rotation = ON
set iterm_relax = RPY
set yaw_lowpass_hz = 0
set p_pitch = 73
set d_pitch = 55
set f_pitch = 222
set p_roll = 66
set d_roll = 50
set f_roll = 222
set p_yaw = 71
set f_yaw = 222
set d_min_roll = 0
set d_min_pitch = 0
set ff_interpolate_sp = AVERAGED_4 ( this is for cheap ass radio signal, Frsky.)
set ff_smooth_factor = 50
set simplified_pids_mode = RPY
set simplified_pd_ratio = 110
set simplified_pd_gain = 145
set simplified_dmin_ratio = 200
set simplified_ff_gain = 200
set simplified_dterm_filter = ON
set simplified_dterm_filter_multiplier = 130

rateprofile 0

set roll_rc_rate = 126
set pitch_rc_rate = 126
set yaw_rc_rate = 118
set roll_expo = 25
set pitch_expo = 25
set yaw_expo = 10
set roll_srate = 72
set pitch_srate = 72
set yaw_srate = 67