Saving a .3DM file

 From:  mickelsen
I like to do my design work in MoI, but then I take the drawing to Rhino for printing and dimensioning. If I make changes in Rhino and then try to save the drawing, it asks me if I want to save it as a Rhino 3.0 file or a Rhino 4.0 file. I presume that I should use the Rhino 4.0 option, but I want to make sure. Is that the right thing to do?