So the engine has been running great (off one cylinder only). I We took the piston out of the non-working cylinder today and discovered 2 scratches on the bore running lengthwise with the cylinder. This is where we are losing our compression. After further inspection we noticed the wrist pin was sticking out slightly on one end...the same side as where the cylinder bore scratches were! The left and right (0 and 180) edges of the wrist pin were dragging along the cylinder wall. So, I bought new rings, re-honed with a flex-hone, ran in the engine with it belted to our lathe, and put it all back together. We are still losing compression but it may fix itself over time...I'm not sure. I may have to take the entire engine apart and have that one "bad" cylinder bore professionally honed slightly larger. BUT, I may have to make a custom Piston to chase the difference. Any tips and tricks to share with us will be greatly appreciated!