Hi Beesley, I like what you've done with the concept, and as per usual your renders are excellent. I have a few points of feedback for improvement, mainly on the kitting, that is intended to be both positive and constructive.
For the base kit, the initial kitting is overall very solid. However, terminal iso is not really needed when uk iso is available. This means you can very easily cut R3 1u pipe and R4 1u pipe. Two things that are preference-based: (1) the Esc legends (GMK style) look to be a tad bit too small, and (2) I would also encourage you to make shift and caps lock vertically centered to increase alignment consistency across the legends.
For the 40s kit, the initial kitting is again overall very solid. The main thing of note is that you seem to have attempted to include "mod quote" and "mod pipe" which are generally great inclusions! However, these keys are only requested when the mods and alphas don't share the same colors. Here, just make those keys alpha-colored. Otherwise, the only other things that stand out in this kit are the preference-based comments I made above.
Finally, I really like the novelty designs. I hope that the samples indicate that this relatively-unproven manu can make the reverse dyesub illustrations. I'll be keeping an eye on this one - if the samples look good and it glows in the dark well, I'm in. GLWIC