That is wicked cool. May I suggest a cube of one color then, on the corresponding sides, have "X,Y,Z" in another color? may be less time than the thingiverse model. Just a quick thought. :)
Here is a quicker vernier scale for X/Y, it also has two small squares and the quick circle split into 2 colors to calibrate z nozzle offset. I was able to measure the height of the two squares and apply the difference to the offset with good results. Whole print takes 25 minutes vs about 90 minutes.
Here is a quick cube print that I made that does well at visualizing offsets
We have been seeing a few of these with small cylinders. I checked the dimensions in the model and they are 10mm with a polycount in the hundreds. Maybe this is something we can tune in with the horizontal expansion setting (or maybe some other cura setting).