Hi Gaz:

I was very careful not to do that as I was hoping to get the piston back into the cylinder close to where it had been prior disassembly. Lots of luck! The rod was symmetrical so I just filed a bit off of the area that was rubbing on the crank disk. I am quite certain that the rod in the engine was not the correct on as the crank pin is still a bit longer than the large hole in the rod is wide. I have a good supply of ST rods but the gudgen SP? wrist pin, on the ST is 4mm and the MVVS is a bit smaller. I was impressed at how well the innards were designed and made. This engine now runs like I have been told that a Diesel is supposed to run. Easy starting!!!!!!!!!!!!!!!!!!!!!!!

Be well my friend.