I went to columbus for the goodguys show> I saw three different styles, took pics and some measurements. Then I went to the local steel shop had the pieces cut and welded it up in a weekend. I have had a 57 chevy on it and a 38 ford sedan. In reguards to haviving a gear system not a bad idea. Two guys can rotate a car on mine with little or no problem. In answer to If I would work under it yes I would and have. I am usin 1/4 wall square tubing.