If you want to split the numpad from the base kit it would make sense to move r1 PgDn and End from the base kit to the numpad kit since those are for 1800 support.
The pipe key (\|) for ISO support needs to be r3, not r4 like in your render.
You don't need an extra ANSI pipe. Those are for sets that use different colors for alphas and mods so people can choose what they want.
You have 2 r4 1u Fn keys. I don't really see the need for more than 1.
Please add F13 to the base kit.
We'd also appreciate if you labeled the size of all spacebars/shifts.