KAT Double-shot Keycaps Fit HHKB Studio Keyboards

A suggestion from a Japanese customer: produce matching keycaps in KAT profile for the HHKB Studio keyboard.

Keyboard Preview:

- Made in China.
- Kailh silent switches, MX(not Topre), cross-stem.
- Stock keycaps are roughly OEM profile, black-on-black colorway, appear to be dye-sub.

Challenges:

- The pointing stick means G / H / B need custom cuts or recesses.
- The 6u spacebar has non-standard stem spacing.
- It still has to be double-shot.