THANKS for taking the time to try it!
I'll surely consider your suggestion for next model, 'cause right now I'm in the rigging/animation phase, and (as usual) every problem I just had 5 days ago seems to magically disappear... (everything works, as soon as you don't need it...)

I know I should invest some time in uderstanding good topology, but I just need the quickest way to visualize various options for a prototype and "loft" or "sweep" are just my actual way to go... ..but sometimes I get stuck with these weird (for me) problems...

thanks again, and I'll come back with some useful insight (if I find any)

best regards and happy new year! (to everybody, in the MOI3D community)

:-)