Hi futagoza (STEFAN),

first of all i wish to thank you for your help.

Unfortunately i was not able to get a correct result following your method,
'cause i haven't passed the first step, where you say
"What i did was to create a G2 blend in Moi, then used the blended parts
and added at the end planar surfaces.".

I did the G2 blend, but the resulting joined surface not have closed planar loops of edges, and then the Planar command did not work.

Perhaps i misunderstood your answer ?

But thanks anyway.

Marco.