[Adam C.]

With it all figured out, we ordered an enormous amount of tubing to complete sets for ourselves and friends. U-bends allow us to get 2 sections out of one 180 deg bend. Material is 2.25" dia. 0.035" thick 321 SS bend at almost a 1D centerline radius. There aren't too many shops willing to supply that, trust me. It is thin, hard as nails, and expensive.