Not to hi-jack John's thread here but just to show an amateur hack job, here's my Strip Dominator I did several years ago. It was a spur-of-the-moment idea, there was no plan behind it other than to gasket match the port openings. I never had it flowed so not sure if this did much of anything except create a bunch of aluminum dust. I only had short-shank burrs so I couldn't get far enough into the runner. Didn't really touch the plenum except for smoothing some casting flash on the entry. I liked doing this but after the third or fourth one it got really tedious.
Strip Dom is OK. The Victor has taller/straighter/longer runners if that means anything.
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Dumore Grinder FTW. John, you turned me on to these types of grinders years ago, they're awesome. I think you have a Foredom? I need a foot pedal for it. The motor in mine is shorted internally, every time I turn it on it flips the breaker. Not sure what I did to it. :BangHead:
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Sorry for the diversion, please carry on.