Originally Posted by RETRO RC

I myself have never broken a wrist pin and with out being able to see the engine and go over it first hand it's a bit of a lottery on the anwsers you'll get.

I would suggest maybe sending it to someone to have a good look over it for you as there maybe a small under lying problem that you may have overlooked and some times a fresh set off eyes see thing we miss ourselves. try 22Racer from all accounts it sounds like he does a very good job at resonable prices

Adrian