This is a sick little machine, get around it.
Size is 110mm wide 100mm long 50mm tall.
I'll try to respond to questions - if i'm not responding, come ask me on instagram - I check it more https://instagram.com/loosestkid_fpv/
The servo 'fences' are untested, but I found I had to glue mine to stop them rotating slightly and making the track slack off. let me know if you have any trouble with them, just cut them off if they're that much of a problem, - and grab the CA.
I have the 123Design File included for download, so help yourselves and mod to your hearts' desire.
Inspired by Tiny Trak - Micro FPV Crawler Group on Facebook
I joined the group, searched thingiverse for stuff similar.
I didn't find anything which was immediately applicable, but I saw a great track/wheel design over at http://www.thingiverse.com/thing:2662828 and started work with that as a base.
Made the STL's solid in Meshmixer, then moved to 123Design and designed it around gear I had laying around.