Gasket porting?

Hey guys i've got a sxipro and i'm putting a fpp on it but looking at the gaskets there's only 3 little holes for water to flow though and such big ports, has anyone ported out the water passages on the gaskets before? i'm planning on doing one 1/2" water inlet to the fpp mani. am i nutz or is this legit?:naughty:
 
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