I used a piece of 2 3/8" O.D. pipe inside of a piece of 2 7/16" I.D. when I made mine, but thats just cuz they happened to be the closest-fitting sizes I had at the time. Id considered using engine stands, but after seeing how much adapting had to be done to them, it was just as easy to make them from scratch. A lil 2" square tubing, couple pieces of scrap pipe, few cold adult beverages, and a few hours of cutting and welding. and voila...instant rotisserie!!!
