I've been fiddling with some sketches of ideas for using the roller blade bearings in a slightly different way. I didn't want to have to machine any parts other than what I could accomplish with my woodshop tablesaw, bandsaw, and drill press.
Here is a sketch of what I came up with. Anyone see any problems with this design. It's just a sketch slightly to scale but not perfect by any means. It's just for concept.
I imagine the stock to be sheet aluminum either 3/8" or 1/2". The drawing shows 1/2". The top bearings are mounted at 45 degrees and the bottom bearing is on a sort of swing arm that is tensioned with two through bolts.