I just have changed the parameters of the beautiful parametric thumbwheel by 67restomodder:
http://www.thingiverse.com/thing:13807
The default parameters are for M3 nuts. In addition I have cleaned a little bit the code and changed the shape of the cutouts.
More information (In spanish):
http://www.iearobotics.com/wiki/index.php?title=Objeto_3D:_Ruedecilla_con_tuerca
thumb_wheel.scad | 1.4KB | |
thumb_wheel_M3.stl | 188.5KB |