I just ported my lower. I hogged all the holes out 1.5mm on all sides with a dremel and their router attachment. Then I tried to straighten out the curves as best I could without filing through the aluminum, then I sanded it and polished it out. It looks pretty tight. Put it back on and had some initial problems. First, my dumbass somehow crossed the #3 plug wire with the #7 plug wire. I think it was when I was taking it out and had to remove those wires for a little extra clearance. Got that fixed, then readjusted the timing and she runs like a top. I noticed a little more on the lower end of the tach and it pulls much better all the way to 6k it seems. Before it really petered out at 5100 or so... I'm going to do the same to the upper in a month or two after I get the urge to mod the car some more. I feel I did a good job. I'm going to the track to shoot for the imfamous 8's tommorow. Wish me luck... How much do you guys think I picked up?