RE: Cox piston Failure
One other way to identify me if anyone is an old cox employee..... At my workstation I had a .049 that had been modified to run on compressed air. The porting was cut into the crankshaft by hand. It was the base of the old reed valve c'case. I had that setup next to my workstation running a large prop as a fan. If you ever walked the main floor of the factory, you couldn't miss it. I still have that "engine".
I was kinda obvious too. Fresh out of the USMC. The haircut at that time wasn't exactly in vogue. This was right after 'Nam wound down.
Dave