Okay - I give up!!!!!!!!!!
I am using v.1.03 HFP-10. NEW 5955's...have studied (downloaded, even) the "DownontheDeck" programming videos. I'm either stupid, can't understand, or something is screwy.
Single-servo wings....setting "center" so arm is parallel to hinge line. Press "M", then "Input", then set both ends (roughly). Press "Input" to save, power off.
Plug into JR 955, with measured (new TX) JR 10, and the center doesn't match. No subtrim is in radio, no mixes, etc.
If I recalibrate with the programmer, I can get it close, but then when reprogramming max travels, it resets the CENTER, too.

What am I missing here?

Yes, I already did "Program Reset", and I've measured the pulse coming out of the RX, and it's right.