Thanks again for the tip, you were spot on. I looked at the STL file in solid works and it showed a completely different picture than other "viewer" showed. Now it's apparent.
When @pishta showed off his awesome formula "S" badges, I noticed the same thing. There is a control in TinkerCad that lets you increase the number of "sides" the round things have and it starts at 20 but can increase to 64. For most things 64 is pretty good, but it's still visible when printed as vertical lines from the segments. I'd love to get my hands on one and model one in blender.
This was my biggest print to date, modeled by me in blender. Cut the model into 8 parts to print, glued it together and painted it... it was for our companies Christmas party.