hi Pilou,

This models is composed mainly of boolean. It is very easy to make a curve, an extruded, and remove what is too much. Moi3d has very strong boolean I think. I use a lot of intermediate lines to produce the volumes, but it's surely the principle of this type of modeler. I have other modelers, however, it is very flexible and allows more creativity I think.
I'm french, I usually keep the interface in English, I make an exception this time ;-)

Temporary Curves: