The “Toxe” project, as my son calls it, is taking shape.
Tell me more about that. 
Are you using FreeCad?
No I don’t, sorry
I was referring to the OP.
Stay Tuned @enhydra , when I finish it I’ll publish the sources, now I’m using Catia, but I would like to translate to Freecad.
I think FreeCAD’s default background color is inspired by CATIA’s so mixing them up from a cropped screen capture is an easy mistake. Doing surfacing such as this in FreeCAD would be a challenge as there are a lot of tools missing. But someone is currently working on a new Surfacing module, I can’t wait to see how it turns out.
Really It doesnt modelled with surfaces, They are solids builts with Splines and some fillets.
I dont manage surfaces very well.
@enhydra I upgraded the wheels