so I started building a datahand prototype for one finger unit and instead of using optical switches it uses simple click buttons.
also here is my work in progress fusion 360 file for download, if you want to collaborate I have a discord server setup here https://discord.gg/ctYr5BVF7b as I really would like to see this thing come to live.
the whole sketch thing is still more in the proof of concept stage and needs some bigger cleanups for a final version.