Ahhh, Elden, you must have skipped over the part where Curt said that his piston ring supplier was no longer providing rings under 8" dia. Quoting Elden DuRand <edurand at mchsi.com>: > Thanks for the primer on making piston rings! Now I know. > > I think I'll buy piston rings, though. Sorta like re-inventing the wheel.