About this 3D model

This is my Brand New construction of easily foldable tricopter with 3D printed frame parts. Cad preview :http://www.youtube.com/watch?v=p_ftcllic2Q&feature=youtu.be Short flight testing video : http://www.youtube.com/watch?v=D2_6gI8uYjM&feature=c4-overview&list=UUvjkv6iyD-di8U5zY7au5yg