My wife is out of town so I thought I would try adding a supercharger to the tandem. My 34 y/o son is a pretty strong cyclist, but never been on a tandem so we're meeting tomorrow am to go on a 61 mile club ride. I had bought a 410mm Thomson seatpost for just such a possibility. I've got all of 1500 miles under my belt so any good thoughts would be appreciated. As long as we're upright we ought to be going pretty fast Gonna put a bit of extra air in the old tires (He's 190+).