Great looking set.
What happened to the 60% kit? Seems a waste to spend $43 for the Tsangan just to get a 1.75 right shift key for the Pure layout.
There are way too many keys in the Tsangan kit. AFAIK, no layout requires two 1.75x shifts, there are already two 1.25x symbol keys in the mods kit and very few people have HHKB layout cherry compatible boards, so the HHKB keys should be in a separate kit with lower MOQ.
For a Tsangan we only need two 1.5x Alt, two 1.5x Ctrl, one 1.75x shift, one 7x spacebar, two 1x symbol keys and one 1.5x Caps. That's it.
The 1.25x Caps and 1.75x Ctrl should be in the mods kit.
The HHKB specific keys should be in a separate kit (Delete, 1xAlts and Fn).