That's one sweet lid. I just started modding mine, couldn't wait. Got it today, opened the box, ran around the house and scared my kid for a few minutes.... Then I just started taking it apart. I was scared as hell to start it, but it wasn't as bad as I thought.
So far I've gotten both ears of (whole and reusable), opened the fourth tooth on both sides and widened the other holes in the frown as well. cut out both mictips (and made sure Stompers hovis fit snug:). Started pulling the helmet apart, but suddenly felt like a break, so ended up playing Siren Blood Curse on PS3 the rest of the night:-)