Luker,
Yes,that is it.One peculiar aspect is that the stretch of housing from the top tube stop down to the cable stop on the derailleur is going to move downward as the arm is pulled from below.I will have to have about 3/8" of bow in that stretch of housing/cable.No problem (I think, but I will have to see it in action to be 100% sure), but kinda' odd.
This seems incredibly complicated, but this is how they did it.No other good explanation.I think having the stop way down on the derailleur instead of on the seat tube-MIGHT-give the cable a more gently turn/angle,and a smoother action.We'll see.
Thanks all.
Charlie