Quote Originally Posted by Frank S View Post
When you make your rollers I believe you will find that stacking the washers to take up the entire open area will be better than trying to set screw them in place
Vyacheslav.Nevolya, I agree with Frank S that stacking washers or parting off sets of tubing would be more effective. Best might be a spacer AND a free-spinning washer to reduce galling the materials edge; bending will cause it to widen somewhat.