Kit - intreresting comment on the "how the seat is tilted" affecting your no hands ability. My riding partner says it's all about how your pelvis and lower abs are positioned/tilted/whatever. She's better at it than I am and tried to get me to practice at the end of our 85 mile ride (during which I pretty much bonked). Not likely!

But it's all got to be connected - weight, balance, abs, pelvis.