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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
Steam Community :: Guide :: Warning for Logitech G27 users! G27 centering problem cause
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How To: Replace Logitech G25 Optical Encoder Disc (Part 2) - YouTube
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Amazon.com: GAOHOU Replacement 60 Slot Steering Wheel Optical Encoder for Logitech G25/old G27/GT5 Stainless Steel : Video Games