Cranklin, we weren't on their official ride, just using the route (which everyone and their uncle does on saturdays)

Fuji, I could see that, but when you're standing there holding your rear wheel with tubes and stuff strewn about you, it's more obvious.

Withm, Yes, I should have played with it at home. I did have 2 cartridges, but blew the first one figuring out how it didn't work! The second one I got rigged up correctly and did eventually prove that it worked at home once I slapped a schrader adapter on. Now I know!