Calibration Circles

thingiverse

Nothing says "You need to work on that first layer adhesion" quite like tiny little circles popping off the print bed. I find this helpful in dialing in settings for that first layer. If you do too, let me know. Depending on your slicer settings the tiniest of the circles probably will not slice (as you can see from the screenshot). Don't worry, if you can get number 4 to stick you are doing pretty good.