Dial Caliper Jig

Someting to check your bed manually using a dial gage with a tab on the back like this one on amazon. 

It is designed to work at 25mm only, so autolevel, then move to 25mm. Power off and move print head as close to the bed adjustment screws and make them all the same.

Needs a 25x5mm, and a 6x15mm bolt or equivalent.