potentpoefie,

You may be able to find some low cost accuracy improvement in the slide stop pin dimensions and the barrel bushing. Using drill bits as pin gauges you can see what size pin fits and improves lower lug contact and lock-up before thumbing through the Brownell's catalog for parts. EGW does a good job on barrel bushings. Also examine the barrel crown carefully.

On Bullseye pistols rear hood fit in the top of the breachface gives accuracy improvements. Slide fit to frame doesn't do as much as most people believe.

These are just a few quick notes. Accuracy tuning 1911s is a deep rabbit hole due to age of the platform and the work of the military teams to wring out accuracy for their competition teams using service type pistols. The same tuning was done when the Berretta M9 was issued and now the SIG P320 is being refined.