Quoting toybreaker:
I've had the best luck using a teeny little wood screw that doesn't have a lot of taper to it.
Just thread it in until the restricter/insert starts to turn, and then twist and pull, and it usually comes right out.
That's exactly how I did it.
I could never tell a difference though, might as well buy a boost controller. /ubbthreads/images/graemlins/dunno.gif