2-DHoler:
It's just my opinion, and will undoubtedly be excoriated for it, but unless there is a SERIOUS reason for doing it (which I haven't found yet), I don't believe "glassing" is suitable for any double gun stock head/action.

If the stock fits properly, the gun will be fine. If it doesn't, the stock should be made to fit properly. To me, a glassed stock head is the greatest reason to not buy a gun.

There. I await public abuse.