I originally tried http://www.thingiverse.com/thing:16098 but found it was too large for my relatively recent SparkFun BusPirate. So I recreated the whole thing in Sketchup using the original for inspiration and reprinted it - works like a charm! :)Printed at 30% infill with a 2mm brim and .25mm layers. Clicked together no problems, but I suspect the thin ring around the vertical connector may prove to be fragile, might need to beef that up.