The work did not have anything to do with the ejector.
When he posted the pictures, I noticed a strange looking ejector that is wider at the front and narrower at the rear. I asked him to post a shot of the rear of the slide in battery and you can see that the FPS is relieved enough on the left side for the wider part of this new ejector to pass thru during assembly/dis-assembly.
I have never seen an ejector like this before and I have sent an email to EB to find out when they started shipping pistols with this ejector. I think the idea is to have more metal at the business end than a standard 1911 ejector.
My 2008 Kobra Carry and my Dec 2011 Special Forces have standard 1911 ejectors and no relief cuts in the FPS.
Thought ya'll might me interested to know about this.