Right, I'll tell the tale.

My RST was owned by my best mate 10 years ago, he blew the bottom end up so started to rebuild the engine. He pulled the head off and had it rebuilt. He also had the bottom end rebuilt and started to put it back in the car. He got the bottom end in and then was taken ill. He never got round to finnishing the car because he died. The car was bought from him and restored to it's former glory, hence why it stands me at an absolute fortune! but I couldn't just let the car die!!! Anyway, that's how I know the bottom end had only done 400 miles. It probably eat a shell just because it had been sat for so long, maybe ceased up or something I don't know. I replaced this bottom end with a known good 1 and kept the origional 1 "just incase". I've since had the "origional" bottom end apart and the crank is unmarked, pistons and rods are still like new so all I want is a set of shells, I'll put them in with plenty of oil on them so they move about easily and hopefully dont cease/ fall apart again.