We couldn't use the CB rim, because it's holding the goldwing that I "borrowed" the front end off of. The rim is actually from a KZ. I think it's a 19" that we picked up off of ebay, for one of our "projects". Going to try and stuff a motor in a little 250 frame.
The lift turned out to be very stable. Just braced in in the right spots. We had a little problem the first day keeping the rope on the rim, but we drilled a new hole for the axle (we mounted it originally on the ground and it wasn't level on the roof) and it worked flawlessly.
We thought about marketing it, but then decided to think more about it later when the roof was done.
If anyone wants, we can ship the plans. The napkin shouldn't be to smudged.