I have an M1 and I’m using openTX so my setup may not work for you. I’m using the OMP protocol so it’s governed. I’m using -100, 0, 100 as the three curves and the actual head speeds are locked in the FBL. My pitch curve is based on a YT video from OMP & Jonas from AccuRC. It’s a linear curve but it jumps over zero. Jonas explains it better but it’s dead band mitigation. I tweaked the numbers for my feel. See attached screenshots for my setup.
What transmitter are you using?