Without looking at the actual model, the best we can do is guess. My guess is that the four corners are not in plane. Drawing a line across the four sided space will close the opening with two triangles.
C-Class Rear.skp (286.2 KB)
Im just not sure why it would do that with a few and not the rest. I created an array and copy/rotated it 27 times for the amount of teeth.
The model is too small and is tripping SketchUp’s nearby-vertex cleanup operation. Scale up to a larger size before adding the geometry and then scale back down when you are finished.
When trying to make a sketchup model to scale, do you just have to double every dimension and then scale back 50%? Im still unsure about how the whole scaling thing works when you are trying to make something to the dimensions.
If the thing you are modeling is small, working at a larger scale helps prevent problems. The common advice it to work at a scale factor that is some multiple of 10 larger. That makes it easier to work with dimensions because it’s generally just moving the decimal point. If you like multiplying by 2 and that makes the model large enough, go for it.
