For the last 6 months I have been working on a completely open flight stick design. Just me working on it. DIY hotas sticks is a pretty damn niche hobby.
6 axis, 32 button, based on the MiG31 design, with a front panel on the base (on this design).
Not the most cost efficient vs quality as everything is 3D printed. Honestly it is my second big 3D modeling design and it was a pretty complicated one to get right. Ran into a lot of FreeCAD bugs. First time working with libopenCM3 also, so much less bloated than STM HAL. Plenty of improvements to come once it is released.
Open hardware with the CERN OHL V2 S and the firmware GPL3.0. Edit: forgot to link it - https://github.com/JustEnoughDucks/LibreMiG-S
Probably beats Hemköp coffee by a bit, I will have to see if I can get some next time I am there! Reddit refugees are always welcome!