Dial Gauge Holder

You will need an M3 screw and thread 20mm or longer. Simply attach this holder to the print head with double sided tape and use your machine levelers to adjust all corners till you see no movement on the gauge. This is the simplest method i found to get a mechanically perfect level bed. If you do not have a dial gauge you can pick one up at HB or on Amazon and they are very inexpensive. This technique will also allow you to pinpoint dips in your bed so you can attempt to fix them. Please ensure you heat the bed to get the most accurate readings.