This is an interesting project, good job MacSurfy! I have a few questions/remarks:
On the icon+text ISO and numpad Enter keys, the ↲ icon is above the Enter text, whereas it's traditionally always been the other way around on GMK and other Cherry profile sets, as far as I know. Is this on purpose?
The Backspace arrow tail seems a tad too long to me. Maybe make it a bit shorter, so it's halfway in between the Tab and Enter arrows in length? Just a suggestion — feel free to ignore it if you think what you currently have works better, as I'm sure you had a reason for making it longer. To me it doesn't look bad, just
odd, but that may be because I'm not used to it.
By the way, you can move the R4 (R1) PgDn and End keys to the numpad kit, since those keys are never used on boards without numpads.
Please consider using R3 \|, R4 <> for the ISO keys, like GMK Firefly, Yugo and Rouge did. These keys cover more layouts than R3 #~, R4 \| do.
1 2Overall, I think the way you have kitting set up is pretty interesting. Glad to see an alternative to the Code keys in the extra mods kits.