I have been working on designing a roof rack for my car and have decided it would be fun/useful to get the model 3D printed. From what I understand in order to print it I need to make sure the model is "Water Tight".

After a significant amount of effort and using the "Solid Inspector" plug-in I believe I finally managed to make the model water tight: https://dl.dropbox.com/u/84843025/SketchUp/WaterTight/Rack%20-%20WaterTight.skp

However after speaking to my local 3D printers they said the spans were a little too long and that I would need to add supports every 10mm-12mm to prevent it from sagging. Given the print platform is a little over 200mm in length I rescaled my model to be 200mm and added supports every 10mm or so. Here is a "skeleton file" of the model with supporting struts: https://dl.dropbox.com/u/84843025/SketchUp/WaterTight/Rack%20-%20Skeleton%20-%20Supports.skp
(the model will be printed upside down which is why the struts point "up")

But when I go over all the "bones" in the skeleton with tube I keep getting holes and I just can't work out how to get rid of them: https://dl.dropbox.com/u/84843025/SketchUp/WaterTight/Rack%20-%20Leaking.skp

I have spent pretty much my whole day trying to sought this out but just can't work out how to plug them. If anyone here would be able to direct me on a good way to fix up these holes I'd be most great full.

All the best,
Slarti.

I have an embarrassingly noobie question here, but I can't work out how to remove an object I imported???

I have a fairly small project I'm working on but I imported a fairly detailed '.dae' object to construct the project arount. My '.skp' files are about 50MB in size including the object. I selected the imported object and pressed delete in an attempt to remove it but when I save the file size stays the same so I can only assume the object is still stored in the 'materials database' or something. Could someone tell me where it might be hiding so I can get rid of it properly.

Thanks.