I started to do the same thing when I discovered I didn't have any all thread or wing nuts. Ok so I head for the hardware store, and Harbor Freight is having a sale. I go inside and am looking in the welding isle and find a set of panel clamps. A set of 8 for $4.99. Ok they are cheap and kinda cheesey, but they work, and I don't plan on doing a lot of panel welding.