Hey there, Really like what you've done with the set here!
I have some feedback for the 40s kitting specifically.
1) Looks like 1.25u shift is missing. Please add it
2) R2 Control/Code is an odd choice for 40s. There is already bottom row control, so Code/Send is preferable.
3) Alt Gr is also a strange choice and has no specific meaning for 40s. I recommend Meta instead.
4) BKSP should just be Backspace.
5) R3 1.5u backspace is missing. Please add it.
6) The big bar should just go into alt alphas. It does not need to be here in 40s.
Otherwise, GLWIC! I am a fan of your theming and colors