Started gapping my piston rings.I'm using a summit piston ring filer and was wondering about the filed side of ring being square. Squeezed ring together and held up to light noticed that my file job wasn't exactly perfectly square.Very tiny tiny amount of light showed me this. Gap itself is perfect at .016 for top ring as per je piston instructions of bore x .0050 for top ring. my bore size 3.287 x .0050 = .016. Is this acceptable or did I mess up already, two rings into process.