Just trying to learn a little more here . . .

We ride with one tandem team which, when out of the saddle, moves the front wheel back and forth a couple of inches every stroke, constantly making little S curves. I can't imagine why, but then we don't ride their bike.

Before I was into tandems, I remember coming up on one on a long pass climb. Out of the saddle, their front and rear wheels were moving out of alignment by a couple of degrees, the frame was flexing so badly. Didn't look at the logo when I went by, too bad. Again, I can't imagine why.

Our CoMo with Wound Up is perfect for us. We have the 1-1/8" threadless. When we're standing nicely, it goes in a straight line without much handlebar loading. My ideal is to time the movement so that I apply the least possible force to the bars. Which is not what I do when I'm trying to apply a lot of power on a single, but is the same as I do during a long standing rest period on a pass climb. In the first case, would fork flex be much of an issue? Seated, we both pedal pretty decent circles, so there's no bike movement at all. OTOH, we're not as strong as the usps team. I do notice that my singles seem twitchy after doing a lot of tandem riding. Again, I don't know why. Maybe the tandem just needs more effort in steering input because of the weight?

I read TGs rake and trail discussion in RTR when I was researching before our purchase. I must confess that I still don't know enough for it to be particularly enlightening. With our bike, I can easily do a U-turn on a narrow 2-lane country road, but I cannot manage it on a 12' bike path, which I can easily do on a single. Handling at all speeds seems fine to me, better than anything else we've ridden, but my experience is limited to only three tandems, the CoMo, an older C'dale, and an older Davidson.

A new tandem team now owns the steel-forked Davidson. The captain is very strong, one of the strongest riders I know, and the stoker is a double for the usps stoker. They like the bike and ride it in a straight line, often using 53X19 on the climbs, but they never stand. OTOH, they never stand on their singles, either.