Oh crap ... this might actually work.  Have figured out how to do everything required for the BuckyBot ... mechanically and electronically, that is.  Still have the tethering problem, but will work that out during the prototype phase.

Extruder turned out to be the key ... but I have that integrated with the hexapod now...  Last post was just the start of the integration.  It all fits.  While I am fabricating parts and constructing the prototype I will endeavor to document everything...  

The extruder only needs 3 degrees of freedom IF I USE THE HEXAPOD TO PROVIDE TWO OTHERS!  

... and I think I figured out the signal processing to allow it to do just that.  It requires positional feedback, though....