I expect that PDF is only on adjusting the internal hub gearing cable. But they have an "owners manual" here:
http://www.dynamicbicycles.com/pdf/dynamic_manual.pdf
and it includes an unexploded, cross-section diagram of the shaft drive (page 17), with a parts list (page 18) that is very similar to the parts list on the Incline page I mentioned above (down to the part numbering) .

I'm still hoping that you who have had such bikes tell me what is "normal" friction, "toothiness" feel, and noise level for the shaft drive - since I just got mine I can't tell whether it's normal or not. It is certainly less smooth than a chain drive that is in good repair. Thanks.