With 3D Bench, calibrate your printer perfectly. It's totally free and open source, forever. Spread the word!
All the 3D bench files are available on GitHub: from the Fusion 360 project to the Gcode. Collaborate to improve it anytime!
The model is xxx grams only, and it prints in less than an hour. Test your printer in a blink!
Use it for personal and commercial use with the GNU GPL licence. Do whatever you want!
Test bridges and overhangs with some key spots and set the filament flow perfectly.