Many thanks to you, I really did forget about that one line in rough perspective, I need to pay more attention, sometimes when I'm drawing I get into auto-pilot and I tend to overlook details. I also struggle a lot with perspective, I find hard to see the shape of the object and get confused when I'm giving it the depth in. I'll go back to the ellipses and build more confidence with my lines. And thanks again for the direct feedback, now I know what to improve.