Hi Jörg,

> I need to watch more tutorials to understand how to model in Moi working properly
> in order to get a clean result.
> Do you know a tutorial that such topics treated?

I don't really have a whole lot of tutorials in general - the ones that are available are listed here:
http://moi3d.com/resources#Tutorials

One general tip is to try and build some pieces more as extended pieces initially that then get cut to their final outline, rather than going around and doing things in a "patch by patch" manner.

There are some tips for people from a poly modeling background here which may be helpful:
http://moi3d.com/forum/index.php?webtag=MOI&msg=4865.2

- Michael

> So to clean those up I used Edit > Separate on your model to break it into individual surfaces, then picked 2 of those fragments at a time and then did boolean union on the 2 fragments to get a result without any interior edges.

Yes, this is a good way to rebuild objects. It works fine :)
Thanks for the description in your links.

The additional commands are great! At this point i didn't know the other commands, but the "rebuild" function for curves.
I now understand much more about how to create "clean" surfaces in Moi.
Your support helps me a lot!

Thank you!

Jörg