First, I love this project and want to build it.
However, I'm going to go 'Old Man Yells at Cloud' on calling it open source and how the maker projects and #3Dprinting may be unintentionally damaging the general understanding of #OpenSource.
a) the model is CC BY-NC-SA 4.0. That is unambiguously not open source: NC means it restricts fields of endeavour.
b) It 'remixes' code without a license from pastebin.
(1/3 - edited to show YouTube preview)