Hello Andrei,

He didn't break any rules, you just don't understand the model requirement and use. I don't understand why you're making such a big deal over the outside surface of this model, for his application it could be just fine, there is one minor issue on the back side of the outer cylinder which is easily closed up. The model gets a bit heavy at a few places spans wise, but if it was a problem for his application it would make sense that he would ask about resurfacing strategies, no? I'd be curious to see how this outside surface should be done, this model is not nearly as simple as you think. Please attach 3DMs.