I opted for the Rocky Mountain gimbaled electronic compass module. This unit gives compass heading even during severe aerobatic maneuvers. This is mounted to the instrument sub panel for easy access to calibration buttons . This plugs into the Micro-Encoder. Also, I lost my first one. This is the second. I tore the garage apart and could not find the original unit I ordered over a year ago. UGGHH!!!!
Here is the module mounted to the sub panel