Cheers m_c.

Yeah, it would be nice to have a bit of pre-load on the roller to eliminate any rattle when not under load. I may have to go for a spring pushing down, though (also seen in the wild) - the take up bearing I'm using has a curved underside which complicates getting a spring under there - it'll mean a bit more elbow grease when lifting the roller, but if it's too problematic I can always remove it. Thanks again.

Wal.

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