Some moons ago I bought a Springfield Mil-Spec 1911. As soon as I got it, I put quite a few rounds through it, 500 ballpark.

Then I got the braincramp that maybe I could do some upgrades.

I swapped the slotted grip screws for hex-head (allen wrench), no problem.

I bought one of those recoil buffer gadgets you slip in behind the spring. No end of problems, couldn't shoot two rounds consecutive.

There at the "no field stripping firearms" gun range, on the firing line, I field-stripped the M1911 (after clearing the gun first, of course) and yanked out that buffer and reassembled. Nary a problem after that, finished out a box or two of ammo with perfect function of the pistol.

I became a big fan of "if it ain't broke..." after that.