What "bottom metal" does it take to put a TBR, Centerfeed, accutrigger SA from a 12FV into an Accustock?

Would an Accustock from an 11FCNS work? If not which Accustock would work?

Is it worth it? (i'm quite happy with a blind magazine. Never load more than two or three rounds. And I lose things, i.e., magazines)