If you will look on about any gun rack at any trap range you will see numerous guns with adj butt plates with their Pads turned to various angles to get this same effect. The chicken or the egg, who knows? Mike
As mentioned above the "Twisted Sister" part of the stock is a pretty common feature on most adjustable butt trap guns. As a custom stock, fitted to the individual, with just the pad attached, I would think is the best look. Having the adjustable comb is great for when different features of the cheek and neck change, as in weight variations. The key is finding a blank that is of your liking, and has the thickness to accommodate the twist. $$$$$$
This is a left hand twist picture from the master, Dennis DeVault's site.
Here are a couple of pictures of my custom Kolar stock ... this is similar to the Twisted Sister, but Jeff Mainlard referred to it as a Twisted Moma. I believe the Twisted stocks also have a significant amount of cast as well as the toe. Bill Malcolm