Porting Intake Manifolds..... (pic inside)

good or bad ?
any tips on this...
usually i was often told ... to never make the opening at the plenum bigger than the opening at the head, by no more than 15% and have it tapered equally thourough to gain velocity and not loose any...
does this make sense ?
opinions before i destroy a 500$ manifold ... thanx..
I think thats the picture of the Endyn modified Skunk2 IM. What Endyn does to it sounds good. Does anybody know anything more about it? Is it better than the regular Skunk2? Worse?
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