Show me a picture of your rotisserie for A Body

I am going to build a rotisserie to work on my A Body and would like to see some pictures of yours or links to ones you know of.

Some demension measurements would also be appreciated. I have a 25 foot peice of 4x4 square tubing with 1/4 thick walls laying around for a starting peice.

Any don't make this mistake would also be appreciated also.