A 3D printed version has just been uploaded to the Cubify 'Design Feed" for free download. This is the DIRECT LINK.
As you can see from this image, the tool simply fits over the print table pads.
|Print Table Leveling Aid (Print table pads simulated)
The ring without markings fits over the back/left print table mounting pad. That pad is not to be adjusted. It is the pivot point for the front/back and left/right height adjustments controlled by the left/front and back/right mounting pads.
The STL is designed so that should you desire the 'tic' marks can be printed in a 2nd color as illustrated above. Be sure to place a mark on the print table mounting pads with a permanent marker to create a dial to follow as you ake the adjustments.
This thing is super helpful. It makes the job of following the leveling directions SO much easier and more precise. The increments are in 1/16th of a turn.
I create these items to make my life easier with my own 3D printers. I have no idea how helpful you feel they may be for your own 3D printing experience. If you choose to download any of the files I've uploaded please check the 'heart' so that I can see if there is any value in uploading them and what kinds of items are most appealing for Cube owners.