About this 3D model

Based on Sandy Noble's Polargraph: http://polargraph.co.ukThis is the first pass at a printable gondola for a Polargraph. It works, but it could use some tweaks.Anyone looking to improve it: the lower section arms are a little thin, and the spot for the captive nut isn't exactly sized right. I'd also beef up the upper chain mounts, as there's not much plastic outside the hole. The motor brackets and pulleys I'm using can be found here: http://www.thingiverse.com/thing:12403Lots more photos of the whole process here: http://www.flickr.com/photos/jabella/sets/72157627888557352/