We are waiting on SVGs at the moment, so there's plenty of time to discuss the kits. As soon as I have the SVGs in hand I'll start the order thread.
There's also the option of two variations of the base kit, one for stepped and one for flat caps lock. Possibly also for ISO/ANSI, yielding 12 base kit combinations:
BASEKIT-{STEP,FLAT}-{ISO,ANSI}-{BLACK,WHITE,DOLCH}
That complicates pricing for me, but makes ordering easy.
I don't think the blank modifiers belong in the base kit though, and possibly not in the buy at all if you can buy them direct from SP.