I'm not trying to help you. I'm trying to enlighten you. Everyone else has given up trying to help you since you have ignored their advice and did things your way anyway. And now you're about to do it again. I can assure you no one here has used a bent file to match cases. And making a template is not the correct way either. You put the cylinder on the upper case half and scribe it from the bottom with a hook shaped scribe. I don't claim to know a lot about porting. That's what I pay Cameron to do. But, from what I understand, 70% of bore diameter is the maximum allowable width for an exhaust port. You're at about 81%. Good luck with that. As far as port heights, it looks like they raised the exhaust 4mm without touching the transfers. Typical Billy Bob work. Pay a builder to do your port work, boring, and crank work. After that it's just assembly, leakdown, and tuning.