I know this will sound crazy, but I like to "feel" the flow. Smooth and round as a baby's butt. No sharp edges, no ripples, no sudden change in cross section/size.
Least you knew not to polish any of the intake/transfers.
Yeah I didn't take too much off the ports really just to clean them up and smooth them up and the picture of the transfer ports were took when it wasn't done. And thanks for letting me know about rounding the intake