A great little project with my nephew. He is from So Cal and him and I went to "Cars and Coffee" when I was out there and he likes Hot Rods. With a little supervision he learned to use the drill press, run a tap, polish metal and the general satisfaction of a job well done. No ground-breaking technology here, but thought I would share. The knuckles are strapped to the propane tank to match the seat curve by tapping with a mallet. Scott...and "Wing Man" Devin doing all the work.