As I recall, Marine Gun Builder had some good Polymer 80 build videos. Process for a printed frame is pretty much the same except you don’t need a jig to drill the pin holes.

If your print is reasonably accurate, you don’t need drill bits. Just chuck the pin in your drill and spin it into the hole. Friction will reflow the polymer to exactly the right size.

The other area where people have a lot of problems is trigger function. The Johnny Glock Functional Friday videos are a great resource for understanding how the Glock trigger system works.

IIRC the holes need to be drilled too the size of the pins. Ill bring home my good drill bits.