This was a super cool item that got successfully funded on kickstarter:

https://www.kickstarter.com/projects/davidpapp/uberstax-a-universal-gaming-accessory

Here's a vid of the real thing in use:

https://www.youtube.com/watch?v=JXSpNpOq4eo

Here are the dimensions of each files' joints:

Filename==========Resolution=HoleDiam=PegDiam
superstax0pt1.stl====0.1mm====3.0mm===2.8mm
superstax0pt2mm.stl=0.2mm====3.0mm===2.6mm
superstax.stl=======0.3mm====3.0mm===2.4mm

If you found this useful, it would bring me great joy to see your work - so be sure to share. :)

Or, better yet, please feel free to dump a bitcoin or two here (I'm trying to collect as many as I can before the apocalypse):

1Py3TUeR8noBN2giHyFV1GfB6x3Kh2WEVv

... include a note to the effect of "Hi 3E8, thanks for the SuperStax thing... my life is infinitely better on account of it and please accept this small handful of bitcoins in gratitude".

You're welcome! (in advance) :D

Also, feel free to peruse my other submissions which are almost as varied as they are many:

http://www.thingiverse.com/3E8/designs

Enjoy!

April 22nd, 2016 update: Updated the file to allow for better stacking.

May 30th, 2016 update: Added a 0.1 resolution version (superstax0pt1.stl) for higher resolution printers. So, now the hole is closer in size to the peg than before. Peg diam: 2.8mm and hole diam: 3.0mm.

Feb 3rd, 2017 update: Added a 0.2 resolution version (superstax0pt2mm.stl) for medium resolution printers. So, now the hole is in the 'Goldilocks zone' of peg-to-hole diameter ratio. Peg diam: 2.6mm and hole diam: 3.0mm.