I learned years ago to pick one task/area to fix and do it for each port on both sets of heads before going to the next task. That helps keep us novices from becoming over-zealous on one port or cylinder before making all the same moves on the other ones.

I have no idea if it's good or bad - but after porting mine, I took them to a buddy with a flow bench to "check" them. I had a 3 cfm spread between best and worst ports. Like I said, I have no idea if that's fairly close or really messed up, but that's how they are.