Get to know the insides of your gun. I would suggest the AGI DVD's as a really good starting point. You can rent a lot of them from SmartFlix.com for about $10. There is a series out done by Gene Schue on how to build a competition gun. Not suggesting you need to build anything up,but he does an excellent job of explaining how things are supposed to fit. He also goes through all of the part modifiication on how to make parts fit in a 1911/2011. I highly recommend it.
I would get your old parts back from the smith you used as well. If your gun has been tuned you probable are going to mess up the sweet spot of the balance between the recoil spring and the main spring, so your cycle rate may be impaired.
As for who did the mods to the gun....who knows. There is no real way to look and tell who did the work. Although guns are a work of art, they are usually not signed.
BTW the Edge is a sweet shooter.