CF2.0 (on Px4) PID Tuning

Hi, I have a CF2.0 uploaded px4 firmware ver “1.5.5”

I keep tuning the pid parameters, but it seems that the motor will crumble a bit longer. Can you tell me the normal parameter information? The values supported by default in QGC are too sensitive to manipulate.

Ex) MC_ROLL_P, MC_PITCHRATE_I, MC_YAW_FF …

Is there anyone who can tell me the parameter values that can be manipulated safely?