Replacement G25 G27 60 Game Gaming Replaceable Ds Deck Case - AliExpress
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
30 Slot Steering Wheel Optical Encoder fit for Logitech NEW G27 / Driving Force | eBay
Logitech G27 off center (a few degrees). Possible fix? | Reiza Studios Forum