Home run - 26 Hans Dampf Snakeskin
This is on my 26 guni. Clean the rim, apply Gorilla tape cut to size, install tubeless stem from LBS, put tire on one side of rim, add Stans, put other bead on (nice tight fit), pump up with stand pump, done! This thing is light and rides great. I have run it as low as 15 psi with no burps, no issues whatsoever - LOVE IT.
Strike one - 29 Hans Dampf Snakeskin
Started down the same path. The bead went on waaay too easily. Had to use the pressurized line at the LBS to get it to seat. First ride started great, near the end of the 4 miles went over a rocky outcrop in high-gear - BAM!! the tire blew off the rim - DONE.
Strike two - 26 Hans Damp SUPER GRAVITY
Wanted to repeat the magic of the 26 guni on a straight 26. Same deal with installation, everything seemed good. Rides nicely, no blowouts, but... It burps Stans when I have harder landings. These are just small burps that don't release much air, but... I just don't trust it. The sidewall is stiffer on the SuperGravity than the normal Snakeskin. I think that is the root of the problem. This thing is just does not have that bomb-proof seal. I am heading to the CA Muni weekend with this, and decided not to risk it and tubed it. I will have to see how I like it like that. When it wears out, I might have to get an HD SnakeSkin and make it tubeless.