Jan, if you are near Richmond, Va. I would be happy to let you try using my rulers. Just send me a pm and we can see up a time to get together.
On the other hand, if you are closer to Lynchburg you might want to contact Amy Johnson, her blog is amysquiltingadventures. She's the person who teaches the two Craftsy classes on doing ruler work on a domestic machine and if I'm not mistaken she owns a quilting/ domestic sewing machine shop in Lynchburg. she might have a machine set up with a ruler foot for at the shop that you could try. At any rate look up her youtube views deos. Also look up Patsy Thompson- she has recently been putting up YouTube videos doing ruler work with her sit down machine.
Rob