RE: Diamond edge limb?
crutch- I have heard guys taking them down to 25 lbs. at Gander. I would not reccomend this. Set it at 30 and see what your son can do. If you got it and they have not tinkered with it, it is maxed out from the factory. I also read in your other post you were going to go with the WB.
IMO, your pro shop should swap out your prong rest for the "Hostage" that comes on the '08 models.