I don't want to use ten (?) pieces where one would work.
Well, that's how this game works when you want to make something more original and complicated. Sometimes you waste CPU resources with this, and I would love to have things like full rotation in walls and roofs, and have also 2m and 1m width walls, but if I want to make something creative I need to pony up and think outside of the box, and use pieces in ways they are not intended for at first glance.