I have a couple of Y8 intake manifolds and a B18B throttle body that I will be using on my turbo setup, so I decided to try port matching for the first time. I used a carbide bit and then a 80 grit 2 inch flap wheel. Problem is that there are some ridges all around the intake manifold opening. Is this a big deal? It is fixable? Or should I just recycle it and try again on my other manifold? How would I avoid doing this again?