Hi PaQ,
thank you for your bugreports :) It really helps me.

>>wish there was a way to automatically scale the model back to his original size to avoid model exchange issue between software
Next version of the script will use constant scale factor (10x, 100x etc.) It will be easy to restore original size of the model.

>>There are all quad and tris (no ngones), however Subdiv fails. Maybe the polycount is too high ?
There are four intersected faces in the rhino model. When moi joins them together it splits edges of this faces. Those quads has 5 or 6 edges. I'll try to solve this problem in the future versions.
>>Hypo..
I still have problems with loadMesh function. It's not stable with imported models which has bad structure.

>> Btw I just want to point an other surface smoothness issue.
Oh, it's a bug of the new loadMesh function :) Fixed. Please check the new version.