Has anyone here done a 40 to 45 swap? I swapped out the barrels, cut off the lip on the bullet follower on the magazine, and took out the spacer for the 40 in the magazine. I wonder if the 40 and 45 have a different recoil spring? If anyone knows the 45, what color recoil spring is in it? The 40 has a dark blue. I wanted to change it because of ammo commonality with another gun I have, a Colt 1917 45acp revolver.