You probably didn't pay much for your ATI, so why spend a lot of money trying to make it something it is not. Any hand fitting of aftermarket parts will damage the gun's finish and cost you a lot of money. I will give you an example: I have a Wilson Combat stainless Government Classic in 45 ACP. I ordered a new Wilson Combat stainless barrel bushing ($17 part) for it. The inside diameter of the barrel bushing is smaller than the outside diameter of my barrel. It needs to be hand fit to my barrel. My gunsmith friend wants $60 to hand fit the new barrel bushing. My Classic sells for around $3,000 new with the options I have. A $80 investment to upgrade this gun is not out of the question. An $80 investment to a $400 pistol doesn't make much sense. Save your money and get a better quality 1911 next time. Remember you can never own just one 1911. I think I am down to just 20 in my collection currently. I have posted this before when I had only 16.