Hi Bob, by 3D printing standards that's unfortuantely an extremely difficult part that you're trying to send to Shapeways.

One problem is that the 3D printer ideally wants to have just one single solid in the file to print, but instead you've got 113 different objects all in the same file there, with some of them not being closed solids and even the parts that are solids are partially overlapping on top of each other. It's rather doubtful that the 3D printing prep software is going to be able to make sense of such a complex multi-object model like you've got. The printing software is going to try to calculate the outlines of planar slices through the object and it wants to form a uniform closed boundary line for each slice. When you've got non solids and parts running into each other it makes it very difficult for it to arrive at a good slice through it.

So that's one big problem - your entire structure there is very complex and difficult to process from the standpoint of what 3D printing software expects to receive, you've got to try to get things into just one solid rather than so many separate and overlapping pieces.

The other problem is the tiny size of some of your details. The shapeways materials chart here shows the minimum detail size for different materials:
http://www.shapeways.com/materials/material-options

You can see that the minimum detail size there ranges from something like 0.1mm to 2mm depending on the particular material. But in your model you have many features that are quite a lot smaller than that for example this little area here has a thickness of only 0.03 mm:






So those are some of the problematic things, I think you'd need to probably significantly simplify and unify your model here before it's going to be very feasible for it to get printed...

- Michael