On the one at Claverton we checked for piston blow past by removing the crankcase cover (like the fuel pump cover it is held on by a couple of hand wheels) and running the engine, can be a bit messy but you can watch the fumes coming out of the bottom of the bores... Don't forget to wear goggles!
Regarding the list, I put my name down as a rep for the one at Claverton when the original register was being compiled but I hadn't heard anything about the mailing list... Seems the publicity may not have been as comprehensive as you thought! There are quite few of these engines out there, I know of at least four in running order, two on boats and two stationary (a pump and a genset). Cheers George "bungle" Eycott
