Temperature & Flowrate Scales

I use these indicators to determine the ideal print temperature and flowrate for new rolls of filament. They take about an hour to print and only cost a few cents worth of material, however they save me a lot of time, guesswork, and failed prints.

For the temperature gauge, I slice it in Cura using vase/spiralize mode, and set the first couple layers to print at my typical settings. At layer 3, I use Extensions>Post Processing>Modify G-Code>TweakAtZ to lower the nozzle temperature to 180C. At