Makerbot Calibration set

This is the calibration prints that I always use when I deicde to try out the new version of skeinforge. I can't find how to make a derivative, so these will be derivative as soon as someone shows me the obvious bright red button I missed.

The thin walled box is Dmatsumoto's http://www.thingiverse.com/thing:1637. it is unaltered, because it's just perfect.

The two other blocks are alterations of Bre Pettis's 40mm cube http://www.thingiverse.com/thing:477.

I learned this technique from