An adapter to fit FrSky M9 hall gimbals to a 9xr / 9xr pro radio transmitter.
For instructions, see this forum thread: http://openrcforums.com/forum/viewtopic.php?f=122&t=6501&start=60
Replace the metal plate on M9 gimbal with the printed part.
Then, drill the outer holes into M9 gimbal plastic with 3mm drill bit.
Open 9xr radio, remove the original gimbal and vertical trim switches. Cut some more plastic around where vertical trim switch pcb was seated in order to fit the M9 gimbal.
Left and right gimbal adapters are the same.
I printed this in PETG, with prusa I3 / 0.4mm head.
EDIT: Fixed the part a bit. Version 1.1 (6.1.2017)