Loony,

My liner is slightly twisted too, but not so bad it will have ill effects on the engine's performance.

I dismantled and cleaned everything except the case, liner, crank and piston assembly... As far as I can see the is no crud left in the engine, and it turns freely (the bottom half of the stroke anyway), so I'll just leave it at that and pray...

When I was washing out the engine case the needle bearing fell out of the conrod, and somehow (don't ask me how) 1 second later the conrod had removed itself from the crankpin... I spent close to 1 hour just getting the rod back onto the pin without removing the liner... aaargh[:'(]