What sizes are the JD40 & Planck modifiers?
I'll try to make whatever kits are requested, it's ultimately up to the eventual GB what gets created and I guess you can't have too many options!
Planck has a 2u spacebar, and everything else is 1u
JD40
1u escape, 1.25u tab/ caps lock, 1.75u left shift, 1.25u ctrl 1u win 1u alt
1u backspace 1.75u enter 1.25 right shift 1u fn and 1.25u x2(Fn, Alt, Win, I have no idea)
Standard 6.25 spacebar
I definitely recommend having at least 1 if not 2 1.25u fn keys available. A lot of people will be using them for tab / caps or having a 1.25 fn and a 1u right shift.
Also I may be biased because I plan to do it with my layout, but 1.25 ` ~ and \ | in the color of the mods.
Let me know if you have any other questions.