Modding Skyviper with brushless motors

Hi @Andresc4, looks good!

You need to adjust PID value. Default is too high for small frame. Probably you will need to change value directly at Mission Planner full parameter menu, (or Sky Viper Web Flight Parameter menu if you have not updated Sky Viper firmware to master.), because you may need to set value lower than we can set through Mission Planner extended tuning menu.

1, Try to set minimum value you can set at Mission Planner extended tuning menu. Rate P, I, D, and see you will not see fast oscillation.
2, If #1 is not enough, change ATC_RAT_xx value directly with MP full parameter or SV parameter menu.
Once copter is flyable, you can proceed to auto tuning to refine.

See my post on conversion, I have attached DataFlash log of my similar sized quad. Open it with Dronee Plotter or something, check ATC_RAT_xx values.

Be careful when you do auto tune. SV transmitter range is very short. I lost my first one fly away on windy day…

Satoru