Nedwreck, did you mill the head or the cylinder? How much clearance was left between the top of the piston and the head? After you milled everything, was it a really noticeable power difference? What did you torque the head bolts to? I pulled the head and cylinder from one of my motors for the first time, and one thing I noticed was the casting flash around the cylinder ports.....pretty much all of them. It wasnt extremely bad, but its bad enough that I want it gone!