@Eddy: Yup, 'twas an interesting experience to say the least, especially since I was coming from a set of Stan's/Schwalbe that sealed without effort. Used regular yellow rim tape on both (single layer) with some or other sealant (greenish bottle, pretty common). Front 2.3 Vigilante (regular TCS) seated with a floor pump and zero sealant, even got that very satisfying *klink* when the bead sat. Rear 2.25 Trail Boss (TCS Tough) was tricky, there was always a place where air could escape, twice I had to take it to my LBS to to use an air compressor. I think it was mostly due to the rear tyre having a tougher casing, and slightly narrower profile that made it more difficult. I could've added another layer of rim tape to increase tightness, or ran first with a tube under high pressure (even leave it in the sun for a day) to get the tyre walls to expand and get rid of any kinks in the bead itself. Ultimately though I haven't yet regretted going for the cheaper option, but ask me again if I ever get a flat and have to macguyver it mid-trail .
