Only thing that is gonna help those carbons shoot better is a bunch more weight up front.

I'm shooting the CE Terminators out of a 45# @ 28" bow, 29" length arrow with 250 grains up front (125 grain screw in adapter and 125 grain Wensel Woodsman).

If you wanna try a cheap test, got to the hardware store and get a 2.2.75" 8/32 thread bolt and a bunch of the same sized nuts. Screw 10-11 of the nuts on the bolt, then screw it into your carbons. If I remember right, this weighed out right at 250-260 grains. Really packs a whallop