I'll leave that to Uncle Nick,I'm just a rookie!
But,IMO,There is original John Moses Browning intent,there is getting it all just right,and there are also tolerances and a whole lot of guns that work,but aren't quite right.
As I said,I only have a couple builds worth of experience.I just figured I would buy and scrap fewer parts,and would be more likely to make a good handgun if I first studied how the thing works.
I recomend getting Kunhausen's shop manual for a 1911 .Brownells will have it.
As simple as it looks,a lot is going on .