I'm affraid if someone had cut 2 1/4 inches off the back of my vise, he would have been in a race to see who could finish first.
He gets his tools packed or I get his last check ready.
I just can't see cutting the back of a vise off like that. My feeling is, if the vice was supposed to 2 1/4 inch less material, the factory would have sent it out like that.
Sorry, but I think you really screwed up your vise.
All kidding aside that's pretty cool, you should post up some pics. I'm always impressed when someone has the skill to modify something expensive with potential for scrapping it or devaluing it, just like that guy who sleeved his table. If it makes it better for YOU it definitely isn't ruined.