Backlash Tower

Introduction.
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This an easy to use backlash calibration item.

In theory you can print it once and be done with your backlash calibration. In reality you probably want to go through at least two iterations. The further off perfect calibration the printer is, the less precise the reading will be. Print an extra after adjustment just to make sure.

Instruction.
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_Update for M3D users: It has come to my attention that the new software that is compatible with the Micro+ and Pro tends to print the tower too large. Make sure to print it at 1:1 scale. Correct size: 1.2 x 1.2 x 6 cm._

The instructions are quite complicated and I created a video to help understand them. If you watch it you should come back and read the instructions anyway.
https://youtu.be/NdDdhVzleWc

After printing the tower you need to study it carefully.
The front and back sides of the print displays the backlash for the Y-axis. The left and right sides display the backlash for