Well here is an idea, im sure there will be people with experience of this sort of thing.

Click image for larger version.  Name: concept 1.jpg  Views: 308  Size: 172.1 KB  ID: 4490

just a basic concept and yes There are covers missing for clarity...

This type of thing is what i was looking into and it all misses the y axis as well so no loss of x or y. excuse the drawing its my first google sketchup