You know you need one. I think I have more 1911s than shotguns and rifles combined. Everying from 22s to 9x19s to 38 Supers to 40s to 10 to 45ACP. I just ordered two more frames a couple weeks ago.
The STI and SVI Double stacks arent much thicker than a single stack 1911 with normal grips. Heck, my carry gun is a STI Commander sized 1911 in 38 Super. 17 rounds of +P, under 27 ounces, loaded.