Looks like convex MBK. To OP: how is typing on convex keycaps for you? Usually people use concave keycaps for the non-thumb fingers

Theoretical physicist here: the hole chair uses Linux, except for two persons that use MacOS

Who else is writing a Marie Curie proposal atm?

People pointed me towards your keyboard when I showed them mine. I was not aware of your very nice board when I designed mine. The 3D structure of your keyboard is very interesting. I would love to try it once.

The hexapoda is my 3rd to 6th keyboard PCB design, depending on how you count different variations of my hexatana keyboards and whether or not you include a very simple numpad PCB I once design for a keyboard/arduino workshop.

You are correct, the layout for my hexapoda supports 5 index keys and 2 pinky keys and two thumb keys per side. However aver having typed on the board a bit, I only use one pinky key and only 3 index keys. I do not type on the inner index keys. I might do a new version of the board, where I remove the unused keys.