How to support this?

[Mjolinor]

I want to print this. I have spent at least two days each on Skeinforge, Slic3r and Cura and cannot get satisfactory results.

If I don't use support then the ceiling of the cut outs flops down, if I use support then I end up with the whole thing encased in plastic and no way can I get it off. I have to drill the holes, I may as well start with a blank billet of plastic and cut it by hand.

All I need is a vertical blade or two inside the cut out only. It seems that you have support everywhere or nowhere.

Any suggestions of what to slice it with and how to get really minimal support