It has one of those ^u^
MP has a motor test function and the online documentation has ESC calibration procedures for Pixhawk and APM.
Cool, somehow all this time I missed it in MP.
I do know I can calibrate the ESCs with the Tx and pixhawk/racer, but in cleanflight I use the master slider instead of the tx for calibration instead of the Tx.
But I'll check it out in MP then I'm sure I will like it, thanks!
Personally I do prefer the Motor 1/2/3/4 that relate to the motor number diagram vs the A/B/C/D tho
Actually, motor test could be more useful if it showed IMU vibration levels for each motor as you test them. May help users pinpoint an out of balance prop/motor combination before they experience IMU clipping in flight.