I've been gassing for a new cab for a while now to go with my TT head. Seeing as the old Marshall MG cab sounds like...well ass really. I also have an old Fender Deluxe Plus 112 from the mid ninties sitting about the house, so i'm thinking it might be an idea to gut it, get a new speaker and use it as a cab, saving me the hassle of getting a new cab when i'm trying to save to do up my Epi Les Paul.

Here it is, next to said Les Paul. Its a fairly big combo, and its opened backed, so may not be prone to boxiness as some 112s are.
I'm thinking of a Celestion G12M Heritage 'Greenback' to go with it.
Has anyone else done anything like this before? Or am i just in a mental minority?