Knowing how to calibrate your 3D printer will prevent a lot of issues down the road. Here's a complete calibration guide along with a list of mods, upgrades and useful prints that you should print first. 1:00 - Hardware overview 4:05 - Firmware upgrade 5:07 - MOSFET 5:31 - Extruder calibration 5:58 - Bed levelling 6:38 - Flowrate calibration 7:29 - PID calibration 7:57 - Temperature tower 8:33 - All-in-one test 9:14 - Upgrades and first prints