The problem with the casts/molds is stuill one of air pockets and other imperfections. Start taking a good look at the Reflex Growlers/powerhawks/superhawks at full draw- you will see the occasional one that flexes (for lack of a better term- bend) at full draw. Jimmy Despart started to notice this (he runs Flying Arrow Sports II near Albany)- and now my my local shop (original FAS) is keeping an eye on all of them when they come in.

This is nothing new however- my first Magnatec (Powerflex w/ C cams) had this issue. At full draw you could see the limb pockets lean to the left as cable tension was reduced at full draw.