I am trying to design a graduated thumbwheel for the bed leveling bolts. I find it most convenient on my Di3 to have the calibrated nuts to adjust the bed.
The thing is the 0.8mm pitch of the M5 screws are making it fussy. At the size it wants to be ~32-36mm diameter, the divisions can get crowded for 0.8/8=0.1mm resolution.
0.5mm pitch for fine thread screws would be perfect, but surprisingly, I can not find flat head M5-0.5 fine thread screws long enough to make the assembly.
So if you were confronted by these three options, which ones do you find most intuitive? Each major division is 0.1mm resolution.