I needed to. When I decided to talk my way into being a Panther beta builder, the one thing I knew could be a stopper was a way to squeeze hundreds of 3/16" rivets. No rivet gun and no 3lb hammer for me. A bud had a 20 ton Harbor Freight press. I had a 2 ton bottle jack. Messed around with both, then decided to give building a squeezer a try. Requirements were that it could be built for under $50 (scrounging required), easy to use by one person, and set nice rivets every time. Off to Harbor Freight for a four ton bottle jack. Results here. So far, two sets of Panther spars without a problem.