Finally got around to pulling the motor apart for pics. When I pulled the heads off, I noticed a small mark on each piston on the left side near the valve relief. No damage to the valve or head so I'm not exactly sure how it happened. The motor ran flawlessly and made no strange noises, I can guarantee its completely cosmetic. I wanted to make sure and add that to my post, don't want any little surprises when the new owner gets it