@ Frenchy:

I have made an irregular geodesic dome with just a few flats. What you see are the rafters of a part of the dome, already cutted from the hull.

May be, I have made a mistake, when I shelled it with TC, because I can remember I´ve read inch in the imported file, but I made a shell of 10 and in MOI I have decimal again. Don´t know. But the proportions look for good. I will make it with wood.