I have a Fat Airic which has sprung a tiny leak. I'm a bit disappointed as it's not been used that many times but hey ho. The hole is where the fabric overlaps one of the valves iyswim? I tried stormseal mid camping trip in desperation but it didn't work. Would something like a puncture repair patch work? Or any other ideas welcome. I really don't want to have to buy a new mat for a while yet!