TMR posited it might take half an hour to make a d20 in Sketchup... it took 35-40 minutes, including figuring out a good process.

For the record, I used TopMod to generate the original twenty-face regular solid (it's an icosahedron, I believe, but my memory may be faulty), and I also cleaned up in Meshlab (couple clicks just to make sure the mesh was ok).

It Skeined great, at least for the jumbo size dice.

Revised design 0006 will no longer put pressure on the X stage.

End stop triggers are important! They should be fastened securely, no jam the optos, and allow for precise positioning at every new built.

These stops are designed so that the Z stage can travel below the build platform, calibrating the Makerbot for a repeatable distance between extruder and platform. This is done by setting X to center and Y all the way to the left. The extruder now misses the build platform, finding its calibration. A calibrated Z stage will bring perfect results at every build without manually positioning. Software will follow.

This is a complete set of six end stops. All six end stops are designed to fit right into their respective places. They are wedged for easy fitting into the existing slots on your MakerBot. All end stops should be a tight fit. They are designed for minimum interference with the system and should not jam the optocouplers once the are bent right.

This is a drag chain for the MakerBot extruder cable (or any other cable/wires).

It keeps your extruder cable out of the Z-stage belt and let your MakerBot look professional (kind of...)

The objects need very detailed printing in order to work. You definitely want a good tuned MakerBot and Skeinforge settings to print this (don't say I didn't warn you!).

The ZIP file contains GCode files for all objects, including 6 or 8 chain links on one raft. It might be the best to skeinforge the gcode with your own, tuned settings. The included GCode files worked for me (resp. my MakerBot), but (again): these are some really hairy objects to print.