You’ll see that a lot has been improved in this second IC. Could you take a look? Please ignore the minibars in the What kit — they’ll be removed in the final version.
Hey, I've taken a look at the updated kitting, and it looks pretty good to me. However, with this configuration, you'd be missing split spacebar and Alice layout support — that would require adding an extra B key, as well as 2c + 2.25c + 2.75c spacekeys, to either the base kit or the extensions kit. Forcing people to buy the 40s kit to get that compatibility is not a viable option, imo. Speaking of which, I think the 40s kit could benefit from further reductions; but I'm not the target audience for that, so you'd best be off consulting the folks over in the 40% Discord server.
Since this set is posed to run with SP, have you considered offering both split-kit and monokit options? This would entail simultaneously running the current configuration with split kits together with a monokit that includes only the most commonly used keys (not unlike a typical GMK base kit). If my understanding is correct, SP has been preferring this combined approach with their recent sets. I suggest talking to them about that.
Edit: The numpad kit is still missing a R1
= key.