Clip-on feet for play yard fence (North States Superyard)

We got a play yard recently, and although quite stable (esp. compared to other plastic products), it still moved and wobbled a bit more than we liked in an open (i.e., non-loop) configuration. So I quickly made these clip-on feet, after testing a couple of alternative designs. Fence now stays put!

The clip-on foot STL is for the [North States metal Superyard](http://www.amazon.com/gp/product/B000U5FOT2). I'm attaching the OpenSCAD source (which is a bit(?) messy), since it could be useful f