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The movement feels smooth and without stickiness, but the friction is just whatever I think it should be acceptable. The adjustable plugs are M10 x 0.75 and they don't take much to overdo the tightness/friction.
Teflon's high thermal coeficient of expansion is a bit of a worry because I made the pads 3mm thick and I'm not sure what happens when the whole thing gets heated to something like 80 degrees Celsius. I might put it in the oven tomorrow and find out. If it gets sloppy after that, then I'll reduce the thickness of the pads to less than a millimeter.
The whole OTA is made of CF composite but it incorporates aluminium inserts in strategic locations. It also contains laser cut MDF in a few places.
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