I'm not talking about the physical size of the magazine, I'm talking about room for a bevel or ramp of a magwell, specifically where the MSH is. The closest you might be able to get is a rounded butt magwell, but that's contradictory to the reason most people get a bobtail to being with.Consensus is it's nicer for carry, but potentially not as nice for shooting if you've got big hands. Only way to know is to try out both. 1911forum.com is probably your friend for specific questions
This isn't really true. The mag-hole is the same size no matter what
How are you adding a meaningful magwell to that? Compare it to something like a Stan Chen SI magwell: