Thanks for the reply. I have tried turning off all of those settings and still, the hole at the bottom gets filled.
I'm using a super old version of Google SketchUp and it can only save 3D files .dae format.
I attached the Cura project file. Any other things I should try? Thanks again.
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GregValiant 1,455
Go to the Mesh Fixes section of the settings and turn all of them off (except maybe "Union overlapping Volumes"). "Remove All Holes" is the usual culprit. "Make Overhangs Printable" is another one that can cause un-wanted effects.
For STL repair I've been using https://formware.co/OnlineStlRepair. It's OK but the file limit is 20mb.
When you ask for help on this forum the most useful file to post is a Cura Project file. Use "File | Save Project". The resulting 3mf file will contain your printer, your model, and your settings. Sometimes just the STL is enough, and sometimes the gcode file is needed, but a project file contains the most info.
Edited by GregValiantLink to post
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