As per konstantin feedback regarding some keys, and further looking at some latest GMK run
Here's some change happening:
Base Kit (and Black Kit)1. Removing 1x R4 1u Ctrl (there's 2x of it previously)
2. Removing 'Any' key except the 1u black one because this one meant to replace the second B (and of course, can be 'any' key)
3. Removing R3 1.75u stepped Ctrl, from scourging ig and google image seems like nobody using this key
4. Making ISO compatibility keys more compact, leaving only ISO return, 1.25u Shift, R3 #~ and R4 \| (please advice about this further, if any)
5. Adding R3 PgUp and R4 PgDn (marked in blue square)
6. Removing dupe ~ and | keys in Black Kit (my fault, they appear in Base Kit as alt color so they have no business in Black Kit) (marked by cyan arrow)
7. Adding accent Return in Black Kit to compensate the total key numbers on each Kit (marked by cyan arrow)
Space Kit1. Adding 6u centered and 6u off-centered
We still have some time before locking the kits, so keep 'em coming guys!
Also, stay safe for everyone in these times