[Holes in model when loading in Cura]

Hello, 

I have checked your model and fixed some holes and reversed faces with susolid plugin in sketchup.

Please let me know if it fixed your problem.

David

77784953_Testonderkantvol_susolid.stl

[Sketchup V AutoCAD 3D]

I'm using only Sketchup for 3d printing for a year now.All the inside faces and holes issues I'm avoiding by a http://www.susolid.com plugin.Also the common issue of reversed faces is covered now with this plugin.Sometimes I have to import other models in Sketchup to fix the issues to be checked and corrected for 3d printing.