Have a Colt 1911 rail gun with Silencer height sites.

Was thinking of having it milled to accept a Red Dot Optic.
I have used the search function regarding vendors.

Question is has anyone ever milled a 1911 slide similar to a M&P C.O.R.E pattern so various adapter plates can be used and different Red Dot Optics can be experiment with?

Is this even possible with a standard 1911 Slide concerning the Internals due to the Dimensions of milling required?

While I understand and accept that the Trijicon RMR is the Standard, I simply would like the ability to try different Red Dot Optics.