So, finally gave tubeless another go. With a big co2 cannister I got the front wheel done. Very pleased with myself. Back wheel pumped up and starting spraying Stan's jiz all over the grass. So it would appear I have a 3-4mm cut in my tyre. I'm not expecting Stan do fix this. Surely 3-4mm is too big and as soon as I put pressure back in it will squirt out, non?
Now, I'm out of co2 again but I'm assuming I can take the tyre off, stick an inner tube patch on and try again? I have both Lezyne stick on patches and standard patches with glue. Or some Gorilla tape?
Still, chuffed I got one done!