Mr. Resnick -On the Nagra the tape machine-like belt path is interesting. (I don't understand the reason for it, but it is interesting.)
The suspension pods -- springs positioned in thick fluid -- remind me of the suspension pods of the early Basis Audio turntables.
An oversimplification of the Nagra belt path and its engineering principles, but the additional loops, or “wrap angles”, provide more friction surface to control the belt(s) movement. DasguhtOhr made mention of these concepts in post #18. I suspect he is much more qualified to explain than I, and might be willing to shed light on the subject?