I have over 650 hours logged of running my Replicator 2 since last May but most of that is with solid or near solid objects. My current project is a 1:6 scale model of a fiberglass fairing that surrounds a bike I am building. The shell was modeled in Blender and is 1mm thick. When I print the fairing it looks perfect but it has two distinct shells that are barely connected. If I flex the print they may even separate.
So my question is what settings do I use in Makerbot desktop to get a solid wall that is 1mm thick?

So far I have tried:
100 Micron 0% fill 3 shells
and
100 Micron 15% fill 2 shells

Both appear to have the exact same results. I assume that with a thickness of 1mm fill does not matter?