I just used the RAS Jambolt on my 05 Speed for the fiirst time this weekend. I went through 1 1/2 cases in 3 hours without one chop. There were 2 other guys shootin Speeds with the stock soft face bolts out there who didn't chop either. So if you chop right now, get the bolt. If you aren't chopping, don't. The Predator board for an A4 should be sweet, but you should probably have them install it for you to be on the safe side. Have fun.
"It's called crack, it's Great! It has cocaine in it, and baking soda, and I think I tasted some cinnamon"