Multi-Twist Möbius Bands

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I generate synthetic content. Möbius strips with 1, 3, 5, and 7 twists. These .stl files were directly exported from Mathematica and then run through Netfabb to fix a few issues in the mesh. Shapes like Möbius can sometimes have problems with normal orientation, but I believe these are good for printing. They checked out as "orientable" in Netfabb's analysis anyway. I printed all of them without any trouble. For those who want such details, here is the Mathematica code... twists = 5; (number of twists) width = 1.2; (width of "ribbon") thickness = 1; (thickness of "ribbon") Export["5twistmobius.stl", ParametricPlot3D[{(1 + v/2Cos[twists/2u])Cos[u], (1 + v/2Cos[twists/2u])Sin[u], v/2Sin[twistsu/2]}, {u, 0, 2*Pi}, {v, -width, width}, PlotStyle -> Thickness[thickness], PlotPoints -> 10, MaxRecursion -> 5]]; ParametricPlot3D[{(1 + v/2Cos[twists/2u])Cos[u], (1 + v/2Cos[twists/2u])Sin[u], v/2Sin[twistsu/2]}, {u, 0, 2*Pi}, {v, -width, width}, PlotStyle -> Thickness[thickness], PlotPoints -> 20, MaxRecursion -> 10]