Baked Gh file wont export correctly to STL File.

Hello people.

so I have a 3dimensional grid structure and baked it. Next step would be 3d-Printing it. 

I tried to make a "watertight"-Stl file and looked for exporting and mesh-editing. But it wont work.

After going through the steps (join, weld <180°>, UnifyMeshNormals, SelNakedMeshEdgePts)

rhino: Reversed orientation of 9008 faces, found 1340 (nakedpoints)

After this I should use the _Mesh, or 

Is there a possibility to connect them so that I have one mesh which is watertight exportable in stl? I would be so super happy if soome could help me :) :/ 

here is the both files: