Thanks all for the suggestions.
I will soon try to import some MoI objects in Sketchup, the problem is that SU free is licensed only for personal use, not professional. Sincerely I did not know ViaCAD, so I searched for information, and it seems very interesting, especially considering the price. It can be a valid option to add dimensions to MoI projects, waiting that Michael will add the feature in MoI 2 :-)

Ciao

Antonino