Hi Phiro,

re:
> I think the easiest way is to use a software with a constraint resolver.

A constraint solver isn't needed - you can just draw 2 vertically oriented circles that then intersect at the needed point for rotate axis to snap on to.

More details here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=2140.46
http://moi3d.com/forum/index.php?webtag=MOI&msg=911.11

- Michael