I wonder whether that's a bit of a gimmick. You could come out with a right unbalanced turkey. I'd either get a stock shape or sell a kidney for the bespoke Bacon on Skype experience.
No gimmick. You choose your desired choses, and pick you weight. They then pick a cleft, and they check the density and the cad software adds, or reduces the dimensions evenly to get your desired weight.
If it does come out an unbalanced turkey, you obviously made some poor choices, but having said that. I've played with about 100 of the different combinations while playing in there factory, and yet to come across one that picks up to badly.
Infact, as I liked. Very bottom heavy bat, they pick up to well for my liking, hence why my 4 b3s are all bespoke. As I just move all the weight to the bottom. Lol