mason jar mesh lid 3d models

(when I closed the mesh the inner cone closed up flat and I didn't feel like fixing it). It still prints fine (use a brim because I think that extra layer is important) and it works when matched with my recommended mouthpiece and rotor (also printed...

(when I closed the mesh the inner cone closed up flat and I didn't feel like fixing it). It still prints fine (use a brim because I think that extra layer is important) and it works when matched with my recommended mouthpiece and rotor (also...

I used GIMP instead of Paint.net for drawing the topography; Octave instead of MATLAB for plotting the 3D model; MeshLab for simplifying the meshes, instead of Microsoft 3D Builder; Freecad2 instead of SolidWorks for the tunnel and the World Engine;...