Rich bought two old Chicago Pneumatic riveters from Raybourn Thompson as part of his shop liquidation sale. New ones cost $700-1000 each, but Rich got the pair for $165. The tandem unit worked poorly, the single piston model did not function at all. I contemplated sending these out for repair, but read online somewhere that “if you can build an RV10, you can repair these yourself”. I took that advice and disassembled everything, then looked for places to get parts. On a tip from my technical counsellor, I contacted Bob Avery at Avery Tools. After many email exchanges with his advice and guidance, about $250 in parts were obtained and the rebuild began.