Sorry BurrMan,

Maybe you intended how i did manage to
position the gears.

Wel in Rhino40 i use the arrow keys to move
the objects 0.1 mm (i personalised them to my needs)

So i used i kind of empirical way leaving plus/minus
0.1 mm of space in this case
(when i align gears on a 'real' rc-modelcar this is the way
i do it)

In Moi3d in most cases i use Circles/Lines as snapping
objects