3D printing is only handy if you are not doing volume work. It's handy for one of projects and quick prototyping.Re 3d printer:
I've read quite some from a guy which instead mills molds and casts plastics. The results he showed are pretty impressive and the costs per volume are much lower than when 3d printing.
I wanted to try this, but I'm much too thorough and slow and then I lose motivation when I don't get results, so this is why I don't have any results yet...
You may not even need to drill a pilot hole, just have it in the design.How do the tolerences for (say) self tapping screws work? print a little block, then hand drill a pilot hole and go I suppose..