Had specced Dura Ace brifters on our new tandem. Fought with front der. problem for 3,000 miles.
Stoker said: "Why don't we go back to barend shifters?" We did; got V287 brake levers which let us get rid of TravelAgents.
Everybody's happy!
No matter what pilot chooses for himself in bars, stoker can use flat/cowhorn/drop bars.