Picking up from where we left off on Day 8, we made some curved LEGO marble run pieces (the translucent blue pieces in the picture).
STL file: http://www.geekhaus.com/makerhome/day13_legomarble.stl
Tinkercad link: https://tinkercad.com/things/jl0We2P6DvM-day-13-lego-marble-run-chapter-3
Thingiverse link: http://www.thingiverse.com/thing:148232
Settings: MakerWare special slicing profile described in Day 8 of this blog, about 23 minutes per curved piece.
Technical notes: These curved models have two base pieces that have to fit into an existing LEGO structure, so there is a lot less room for error. Depending on your printer you may want to rescale this piece a bit.