That's an awesome idea! Can I borrow your tool for a few days next week?
You are welcome to borrow it, but it probably won't fit in what you using for metal tube. My feeble brain says the washer is around 2". It probably only works on 3" tubing the way it's made.
Also, we don't go to Petaluma anymore, car isn't there now. You'd have to come to SF or Vallejo to pick up the tool..
It would probably take you less time to go to Maselli's (I love that hardware store and I have yet to tour the giant scrap yard), get the appropriate pieces, weld them together (JB Weld would probably work too). Then you own the means of production.
Also, Maselli's undoubtedly has the conduit too. It's one stop shopping.
10X+ Loser - Delinquent Racing - '86 TRUMPACO Merkur - '17 Sears Pointless, '16 Pointless, Vodden, Arse-Sweat, Button Turrible, Arse-Freeze - 2015 Vodden, Arse Freeze. '96 Ford Taurus SHO Skunk - '17 Vodden (Hope for the Future award - not me, the rookies), '15 Pointless. Button Turrible.