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The friction pad appears to be made out of a white hard plastic, could be a teflon but I'm not good at identifying different plastics. I've had the light bridge for about two months as well but I've only had it out about eight times (damned clouds) and I generally don't tighten the friction pad if I don't need to, so I've only maybe used it only a couple of times and my alt bearing does not display any signs of friction. There is a slightly 'buffed' zone where the contact point is but it is still very smooth to the touch, no scraping or surface deformation that I can detect, even with a wet finger. I'll be even more careful for now until I can figure out some way to prevent this happening.
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