I do not have a printer but I like to come up with things in CAD so I've not actually tested this model.

I originally drew this model up back in 2017 and thought it would be fitting to release it to this contest.

It is about 150mm x 150mm x 3mm and can be used to draw guide lines in an isometric view with the top guides at 120 degrees apart.

I also included a quick and simple protractor, it won't win any accuracy awards but its a quick and dirty angle approximator.

I'd like to add lines to represent each degree on the protractor and ruler markings on the sides, I'd also change the design so it doesn't have to use as much plastic.

If you do print this design out, feel free to let me know what you like and what I can do to improve the design!