Prusa's original DXF for his Y motor bracket made the curves too chunky for my liking, so I remade it in OpenSCAD. Now I can take full advantage of my firmware's jerk setting and get beautifully smooth curves at full speed.
I also added slots so that it's easier to install, or switch for my http://www.thingiverse.com/thing:15988 . They're oriented so that as much structural stiffness as possible is retained.
2) Observe smooth curves instead of faceted, lumpy ones