I use a drawing pad, so it's easier to make good circles. Now, I can understand reworking Drone's, because it looked much rounder up close. But I draw damn fine circles by hand, and only alter it slightly afterwards, to avoid "perfect circles" and if the design calls for it. My goal is first to make something unique the user will like, and then to make sure it falls somewhere within the guidelines, since (again) the are left to the artists discretion. When I drew Ossku's original design, I knew I had taken it too far by adding ear shapes and bringing out a jaw. I know where the limits lie, even when they are not exactly stated. Menschmaschine's ball in specific appears to be helmet-shape in relation to it's design and inspiration. However, if you'd notice, Scarecrow's EOD inspired ball does just that, as well. So if you are that concerned about everyone having such perfect, imperfect circles, then there should have been some template or selection of templates for everyone to use, rather than leaving it to the judgement of those drawing them.