I guess my confusion stems from the fact that each of the adapters is basically a replica of what is already the face of the vz receiver stock well...a bolt hole. Some details may change, but that is the gist from what I can tell.
Of course, I have been shooting a rifle, of any kind, for about three months now. I go forth with unchallenged Newb status fully intact, and with a firm grasp of my own utter ignorance and and an almost total lack of experience, I proudly defer to those with some actual data upon which to stand.
But still, it just seems like as long as the grip bolt holes on the underside of the receiver line up when the stock is completely in position, then you should be able to simply mark where the receiver stock well bolt hole would line up with the stock and very simply just drill a hole into the stock at that point. All that would be left to do is to get the right sized bolt, screw the two together, and Viola! you'd be done.

The big setback I have seen is that the distance from the grip bolt hole on the bottom to the rear of the receiver is not always copacetic with that same distance on a fully in place stock. But can't that be taken care of for the most part with Dremeling?

ProfB