For building large, complex megastructures:  Central computer (a pc) will monitor positions of any and all BuckyBots building a structure.  Structure resides in PC as 3-D CAD model.  Central PC sends orientation commands as data frames to all BuckyBots.  Each orientation is tagged with BuckyBot identity, so each Bot can identify its own data.

GPS is used for gross position (that's why the orientation board has a GPS module).  Considering using active/optical means for fine positioning.  Positioning doesn't have to be precise ... would be happy with 1 meter resolution for most structures.