+1. I've taken a scalpel to the front bumper for a perfect fit. It's important that the bumper is a snug fir inside the shell on a GT as the body posts are so far back.
The bumper must support the front of the shell so it doesn't deflect under aero load and when you hit something the shell doesn't bend around the posts - there's a lot of leverage there!
Type A - Kamtec Ascari - handles the best all round for most people. Some people swear by the Type F - Kamtec Ferrari - but I find it vague in mid-corner and a bit squirrely in chicanes. HTH
