OCTIX is a block and stick construction toy. The basic blocks and connections are octagons. The sticks come in 50, 70, 100, and 140 mm [multiples of 2 and sqrt(2)] since assembly is always at multiples of 45 degree angles.
If you ever played with Tinker toys then this system is familiar to you already.
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The included project file contains all the items needed for a basic starter set. The set was developed and tested using:
I had no issues with adhesion. On three print runs I have lost only one stick. If you have problems with adhesion I recommend that you thoroughly wash your print sheet with dish soap and warm water. If this does not solve the problem then add a brim.
It may be helpful to set the "Elephant Foot" setting to 0.4 in your Printer settings as well although I have not had any issues with fit.
The author hasn't provided the model origin yet.