With me, most of the readjustment gets done in the first few minutes. To be /really/ at home requires more time. Switching unis becomes easier if you do it more often, not necessarily right after each other.
While we're at it, I had a funny experience a few years ago. My only regular ride at the time was a 24" Semcycle. Then one day I tried a 24" unicycle with an axle that was eccentrically placed in the wheel with moderate offset, 2 or 3 inches off the wheel centre. I found it actually surprisingly easy to ride, requiring not more than a few minutes to get used to. But then... after half an hour, I got back to my normal wheel immediately after it. I couldn't ride it at all! I was almost convinced that something was severely crooked on my own uni, but everything was fine - except myself. It took me a few minutes to unbias my reflexes.
Klaas Bil - Newsgroup Addict -- I think profile should make some stronger 145mm cranks - Ryan Atkins