Well got a lot done almost of the internals are in, and the measurements are in specs. Ordered the correct pistons for the Kent style crossflow head, piston rings I have never seen them so skinny, .040 thick like chain saw rings. Guessing the run-time will be in hours instead of miles? LOL Waiting for the head gasket from the UK needed a larger combustion chamber ring, wanted to go layered steel but the head and decking surface was not correct to do so. IDK... I keep close contact with the "ones" that build these little Indy motors, I pretty sure they have the knowing. I do like the chain tensioning device, no tension, but it takes up the chain slack automatically.