Yeah Dave-I have had the materials to build one twice.Well really a frame jig that rotates.

The nightmare is the car taking off lifting me off my feet,hurting me and the car.Well a really bad day in general.

In my mind,level is very important.Refence points to level that is.So in what I had in mind,there is no rollers,just adjustment feet to make level.Doesn't get moved until done.