This is a simple, customizable pickup ring. Complete with counterbored holes, this is a great way to customize your guitars. The default sizes are for a PRS P22 (and should work on any 6-string PRS model with humbuckers), but the customization allows this to work for basically any humbucker setup.

You can also see the pickup rings printed for an 8-string Strandberg Boden.

I printed these with 0.1mm layer heights and an 80% infill. This makes them very solid but prevents the curling I saw at 100%.