Custom Tap & Die Storage with space for all types of tap

[Dr.Al]

Wow, seriously.
You made light the fact drawers generated by 3D printing. Clearly the best utilization I've seen of additive manufacture in private use, simply terrific!
Never has one single project spurred interest for process and equipment alike.

With vast [jumbled] population of imperials, metrics, pipe, lesser in BS, Whitworth, ACME etc representing up to 100 pages or so each Machinist's Handbook, Colvin-Stanley, Frankland, Glover and others, up to my nuts in thread cutting hardware.
The only feature worth adding, space or marking indicating ideal 75% thread tap drill sizes.
Already envisioning one cabinet marked Inferial for Marv K., and another Antediluvian as hat tip to you.
The rest need be content with their given [aka boring] designations. Lol.

Without your location is not displayed, assumption is other side of the pond. I don't recall coming across the term 'serial taps' before, so took the dive. Our marking system includes Class of Fit, conceivably could be used in a serial manner, not been called to do so personally. Commonly we buy Class 2 and 3, and adjust theoretical fit via hole sizing. Intermediate reamers or bore-to-size make this quite easy.

Thanks @Toolmaker51 . I only recently acquired the 3D printer (just before Christmas) and am finding it a lot of fun to experiment with, but I'm only interested in using it for tools and related applications, not in making little models of things. When I started doing metalwork (probably about 10 years or so ago) I think I thought a tap was a tap; since then I've accumulated a massive selection of threads and types.

You're right that I'm "the other side of the pond" - in south-west England. Serial taps are pretty rare here too, but I bought a lot of sets of them a few years ago and they're great for stubborn materials as they cut much more gradually than standard (even taper) taps. When I have to cut small threads (e.g. M2), I reach for serial taps by preference as they're so easy to use without as much risk of breaking. The first one hardly cuts at all but naturally follows the hole direction; in doing so it creates a subtle thread that the second one (which removes the most material) can follow. Then the final one brings the thread to size. I think of them as being a bit like a centre (or spotting) drill, a drill and a reamer - one gets you going accurately, the second takes most of the material away and the last gets the size right.