I've been playing around with a new case design and I ran into some #3DPrinting settings that had some counterintuitive results.

Higher quality (smaller layer height) produced worse results.

The top #Signet in each picture was the one with the highest quality settings, but the keyring is rougher, and the USB-A hole isn't tall enough. The exact same model turned out fine with the lowest quality settings. While the layers are visible on the unit at the bottom of the photos, they're nice & smooth.