i'm not so sure... 7075 is precipitation hardened, not strain hardened, so the important thing is the heat treatment following the initial forging. As long as the forging billet has been strained enough to remove defects (voids/break up inclusions) i can't see how that would affect the final product significantly. I also thought that 7075 was best worked after annealing? not saying you're wrong (!), but where did you find the info on middleburn production? do they actually forge to a "crank" shape, or do they simply mean they use a stock 7075-T6 billet..? you could read that either way... anyways, i think most people have decided that CNCing is good adam