Magwell?
As is often the case, it depends on what you want to do with the 1911.
Some Magwells work better with some 1911s. Case in point, I have a Kimber Custom II with a 2 piece Wilson Speed Chute SS mag well and SS flat MSH. It is a dedicated range gun, so no worries about CCW. (besides, I'm in MD)
No grip modification, blending, or other smithing was required to fit the unit. Both pieces are held in by a common recessed grip pin. The pieces can be used together or individually.
Other than using magazine bumpers on my mags (which I already use and like), no modifications were necessary.]
I like it for what it is, but only use it on the range.
As always, YMMV.
-LeadPumper