"Project North Star" is open source AR device by LeapMotion.
But this device is hard to make. So, exiii.Inc has piblished the MOD.
This model is split version of this MOD to print with small 3D printer.
First, you check this article and download exiii's model.
I am a student studying product design in Kyoto, Japan.
From June 2016, I began making electronic drums as a hobby.