Yes all my parts have a volume amount, which I'm assuming means it is a solid because there is no other indication in the Entity Info saying the parts are solid or not. I have both fixSolid and Solid Inspector which helped immensely at getting my model to the state it is now. But the issue is when I group/make component all the parts together to use Slicer5. It says my model is not a manifold solid which I know it is. Maybe I'm doing something wrong?

Hi,
I am very new to SU but I've managed so far to get by until now. I am trying to use Slicer5 to slice up my model. My model has 5 components all of which are solids and SU recognizes them as solids. However when I try to group them or create a new component out of them in order to use Slicer5 I get an error that my model isn't a manifold solid. This seems to only happen when the model is in a group/component. I'm not sure what to do, any help would be great.

I couldn't upload the file so I posted it to the warehouse:
http://sketchup.google.com/3dwarehouse/details?mid=a3927e6baceefafe4bb11506a66e5e90