Files are remixed to a higher resolution so the last layers are layed as circles and not with 5 corners... added a knob to turn the assembled Thing on gears 1 and 6. hole diameters are trimmed to 3.3mm and 6.4mm for the M3 head. intend to use DIN912 M3x16mm screws. 20mm lenght should also work. Center block is in 3 versions to get the right Diameter if you need to scale it up or need tighter holes: 2.4mm, 2.6mm and 2.8mm. i´ve took the 2.6mm Version and scaled it up to 102%. print files 1-8 once and the Center of your choice. you need: 8x DIN912 M3x16 screws (18 or 20mm lenght should also work)