Hey @gr5 I did, and it should be fine.
Cura even loads the model correctly, X-ray is fine too.
Once I slice it, it just fills the entire thing.
I noticed the problem once I loaded it into Octoprint.
Here is what happened;
Loaded it in Cura 3.5.0
Clearly this is loaded in the middle of the print bed.
But once loaded into the printer, this happens;
It loads in the corner, making it unprintable.
Also it filled up everything.
I did make models with Sketchup already, but this is very weird, and I don't think Sketchup is to blame here?
Anyhow, thanks for the reply already, hoping to get this resolved ?