Parametric Belt Buckle

I wanted to have a look at OpenSCAD so I redsigned
http://www.thingiverse.com/thing:8198 to be parametric.

You can choose the width of the belt, the number of open sides, the width of the bars, the size of the middle piece and the size of the openings as parameters.

See http://miniaturegiantspacehamster.blogspot.com/ for details on the original design.