It's a shame this launched with such oddly split kits. For example, you need "Base Alphas", "60% Modifiers Kit", "WhiteFox, 65%, 75% Modifiers Kit" and "Tsangan Colemak Kit" just to cover a HHKB.
For a WKL layout (with the 1u winkey) you need the same as above.
There are so many duplicate keys that just haven't been considered. For HHKB you end up with 3/4 duplicates.
"WhiteFox, 65%, 75% Modifiers Kit" is generally a super weird kit. It's got 1800 keys, some novelties, a Clueboard shift, and a couple HHKB keys.
"Tsangan Colemak Kit" is also flawed. It has 1 key regarding Colemak, but you need to combine it with "WhiteFox, 65%, 75% Modifiers Kit" to actually make it useful on 90%+ boards. It also has elements of 40%, when there is a Ortholinear kit below?
Kits are supposed to make it so you don't have to buy unnecessary kits, but you end up buying lots as the compatibility is so spread out. I'm guessing its too far in to change anything, so good luck, but it's really a shame that it wasn't done properly.