A few months ago I was contacted by Rich and Ivan, about helping design a prosthetic hand for people who’ve lost fingers. Alas I wasn’t able to commit my time to it back then. However they recently posted on thingiverse their 3d printed prosthetic used by a boy called liam. I took the Stl’s and rebuilt them in .dwg format, and then tweaked them for aesthetics. I uploaded it to thingiverse here.
A vid of Liam using Rich and Ivan’s prosthesis.