Originally Posted by J Baldwin
although to this point I have somehow mustered the required skill to build up and quite easily maintain my other tandems
Good to hear although I am surprised by all the parts. Love to see some pictures when you get back to Texas and I would still recommend Bikemart take a look at it. Issues with shifting on my triple road bike turned out to be flex in the BB caused by a hairline crack in the carbon fiber frame.
I guess I dont understand the discussion on cable tightness and the behavior of the derailer - none of this has anything to do with chain line so the pictures may help.
The heatshrink frame cable guides wear out after 2K-3K so I am assuming you have replaced these 15-20 times already? I now have 10 speed and I will post some pictures later this evening.
I will also take some measurements to compare with your own bike.