I just came back from a short ride with the gf and managed to get my 4th flat on 138 in Canton, MA. This time it was a blade from a utility knife thrown on the side of the road. The tire has a nice gash in it but it held with a new tube long enough to ride back. Anyways, this is the first time I've actually had to use my Planet Bike CO2 pump, and I'm shocked how awfully designed it is. With the included tank, the chamber was too long for it to properly engage and it all leaked out before I could even use it. I happened to have a spare tank, and the chamber was so long it couldn't even puncture the tank. I had to stuff a piece of paper in for it to puncture and make a seal. What's the deal?

I could understand if the aftermarket tanks differ slightly in dimensions, but the issue with the included tank tells me there's an oversight in it's design.