bed-level test

This is a simple calibration test I use to verify that my bed is really level at 5 points (corners and center). I have found this to be really helpful to dial in on top of paper / spacer checks.

## About the prints:

- 5 squares 25mm x 25mm x 0.2mm laid out at center and each of the 4 corners.


There are two files, one is setup for a 12in x 12in (300mm) bed and the other for a smaller printer with a 6in x 6in bed (150mm).

Hope this helps you all as much as it did me :)