Greg, if your piston and rings were that bad off, it makes me wonder if they didn't do any damage to your cylinder as well. I had a damaged piston that seemed to have left my cylinder intact, but in the right light I finally saw some scoring (actually, it was easier to feel for the damage than look for it.) Maybe you should get a compression tester and see what kind of compression you're getting. Even if you have a loss of compression, it might not be a scratched cylinder, maybe you need a new head gasket or something. Did you torque down on the head bolts properly?