zack's description of how to file the intake is more helpful than a photo, but regardless here's my intake.
it's not perfect, but i was running it for a long time without it filed down. i just put a thin layer of the right stuff on each side of both gaskets (cylinder to reedblock, reedblock to intake) and never had any leaks and didn't have to tighten it down that much.
does anyone have the stock polini exhaust size? i'm curious what percentage of the bore i'm running.