Hey zekth, consider changing the second 1u Ctrl key in the base kit to Code to give it some extra flexibility (like you did in Be The One).
The second 1u Ctrl on it own isn't very useful as pretty much no modern layouts outside of 40s use 2× 1u Ctrl. Code is a generic key that could work as both Ctrl and a few other things (Delete, Fn2 etc.). In fact, I suggest changing Ctrl → Code as well as removing the R4 1u Delete, since that key would also be covered by Code.
On a different note, in the JP legend reference, you listed Code as corresponding to 英数. However, I don't think that makes sense, as 英数 has a specific meaning on JP layouts (toggling between kana/kanji and alphanumeric characters). You may want to use コード instead.