Well, I can try.....fortunately I'm better at building then I am at describing...

Ok, the cylinders will be of sufficient length to allow the mounts on the rotisserie to be low enough to attach to a body or frame while it's sitting on jack stands, say 12" or so. Then I can raise the cylinders up with the hydraulics til the body and or frame is at the height I want.

The rotation will be through a spool valve, hydraulic motor, and the foot pedal. When I'm working on the car while it's on the rotisserie be it making up pieces, welding, or whatever I can just step on the foot pedal valve and rotate the car to get it in a more better working position... The spool valve must be like a check valve on both lines, holds constant pressure against the motor so that the rotisserie doesn't 'free-wheel" rotate when I'm working on the car.....

Don't know if that explains it or not, what it does explain is why I was never hired to write tech manuals!!!!!!!!