Control Knob

What really annoyed me was how the cylinder edges have been compressed into lower resolution, less accurate circles which is causing this unsmooth appearance to the circles  and is particularly vexing where this phenomenon doesn't line up properly between two circles where the black circle meets the rim. I was also hoping for a glassier appearance for the black face which was intended to be a glass sheet on a black background to create a nice finish - similar to how high end smartphones layer glass on top of the metal body.  However, at least I learnt how to create a knurled surface and that was the bit that I enjoyed making the most.