Can we please stop ruining 40s kitting? This keeps happening with other PBT sets and everyone is just copying the same terrible kits off each other.
40s have unique modifiers in R2 and R3, and sometimes one or two in R4.
They share the same R4 bottom row keys as normal keyboards. You can cover the overwhelming majority of spacebar layouts with 2 / 2.25 / 2.75 (standard Alice) and a 6.25. 2x3u is often appreciated in spacebar kits.
There are two ways to do 40s kitting in ePBT (which is where this kitting has been copied from):
1. Do a proper base kit with alphas and mods for 60%+ boards and add a 40s-specific kit with the unique R2/R3/R4 mods only (and spacebars if you don't have Alice in base).
2. Do separate alphas and mods and include a 40s mod kit that has
both the unique R2/R3/R4 keys
and the common bottom row keys that are shared with other keyboards.
The way your kitting is setup currently is such that if somebody wants to cover a 40% they need to buy alphas, the 40s kit for the unique 40s keys, and then the regular mod kit in order to get like 6 keys for their bottom row, and then the spacebar kit for the spacebars. This is something that's insanely easy to fix.
If you're absolutely set on not doing a base kit (I don't know why? Just do a base kit) then you should do a proper 40s kit that offers coverage for the majority of 40s and ortho boards when combined with the alphas, so 40% users can just buy two kits.
If you want a good example of basekit + 40s addon, check out ePBT Origami kitting (
https://geekhack.org/index.php?topic=112884.0)
If you want a good example of alphas + 40s modkit, check out ePBT Acid House (
https://geekhack.org/index.php?topic=112022.0)
That's it. Do one of those kits. Then get some people who know stuff in either keycap discord or 40s discord to fix any minor mistakes. But stop repeating this awful four-kit 40s kitting that lazy designers have been pushing recently.