coopertom on Twitter: "I found the culprit! A cracked optical encoder disc. This is why my Logitech g27 steering wheel is losing calibration http://t.co/Kvpyejyf3e" / Twitter
The Steering Wheel Optical Encoder of 60 Slot for G25 / G27 Old Version Driving Force GT Steering Wheels Systems Spare|Replacement Parts & Accessories| - AliExpress
Logitech G25/G27 Optical Encoders by S2KTS - Thingiverse