I have my HHH drag brake operated via Shimano deerhead shifter mounted
inboard on Boscos. Going down the hills, I use my thumb to actuate the
drag/disc brake. My shifters are bar-ends (right-rear/left-front); and
brake levers are standard.
Works great for scrubbing speed.
shoji
Arlington MA
As mentioned, a third brake at the rear wheel was used to slow tandems on
steep descents. For many years the brake spec'd for this was the Arai drum
brake. When they stopped manufacturing, there wasn't much in the way of
alternatives (though now apparently there are replacements available again.
