I had a neck operation yesterday, so I was medicated from that.

Today I'm just a little sore.
I hand fit both my carry gun and the gamer gun, even though I could've done them on my surface grinder - it was something I wanted to do for my own gratification. Aside from some of the slide cuts, you can get the frame and slide built with hand tools and a vise mounted to a sturdy bench, but keep in mind I've been using files for going on 30 years now. I started young.
The bushing to frame fit really needs a lathe or you risk making it wonky or worse yet, too loose. The bushing to barrel fit is tighter yet, and needs a reamer I don't have - so I bought my barrels matched with a bushing. I had great results with my nowlin barrels, but many of the top tier custom builders don't trust them from some QC issues they had years back (best I can tell it was in the 90's and not wide spread). Nowlin had some barrels split down the side of the bore letting the steam out (so to speak), but didn't damage any guns or hurt shooters from the failures. Kart seems to be the one they'll all agree on now.
Barrel to slide and frame fitting will make or break your gun. This includes the bushing to barrel and bushing to slide fit as that has a large impact on how consistently the parts orient when it locks up.