DaemonAssassin
Why should we Free BSD?
Bummer, I know. I don't understand differentiating frames by manufacturer.
If you want to build something very specific it is worth it. There are a couple of 'short block' kits offered - fitted frame, slide and barrel. Several makers offering frames and slides will fit for a fee. You can also start with a good base gun like a Springer and go from there, learning the particulars of the 1911. You seem to capable so you will choose a route you are comfortable with.
If it is particular pattern you want there is probably already one offered commercially.
The nice thing about 'rolling your own', liken to building an AR, is learning what you really prefer without spending a ton of money. This way you just spend half a ton.
Owning a factory built 1911 is one thing (I already own one), building one is going to help me understand how it all works and fits together. I wanted to do it as another project, so my hands are not idle over the next fall/winter.