Thanks for all your feedback.I solo'd the KHS, then Duet. We paired on the Duet first. That sequence, given our inexperience, played some role in the wobble. I think the relatively narrow roadie drop bars also play a role. I'm much more often wobbling at lower speed on my 1/2 road bike than the other bikes with 56-62cm bar configurations. I've been back on a bike for 4 years but a road bike only 4 months.