Commenting post 307: Hi Danilo, Very interesting.. Of course we need to get out of pure 2D calculation software. I knew frame3dd, but not the 2 others. I'll go look at them. Basically what stops me most here, is that I can't use any of these softwares, and I know nobody who knows them well. If you are interested, it would be nice to start a discussion around these on the FreeCAD forum!