I’ve successfully resealed a K1 twice before so this wasn’t my first reseal. But after replacing every o-ring, valve seals, opening valve, I still had a slow leak. Sent it off to Kelly and he found it to be leaking from one of the opening valve seals. He replaced it, test fired it a bunch of times and let it sit for 2 weeks to make sure it didn’t leak down. Not only is Kelly the most knowledgeable Huben tech but his customer service goes above and beyond.