Well I have changed the spring and had my shock out a few times and re-set it up to the right adjustment going on 22 times now. No matter how hard I jam the jam nut (Way beyond spec torque) it still loosens all on it's own over time. I don't think you can possibly JAM it tight enough. I had the bike up 2 feet high and two very long wrenches and used a sledge! Still loosened up! So I tried Red threadlock, that's a no go. So today we were riding and I got that feel and sure enough it's all loose again. So I adjusted it back up to 2 in and used loc tight again and this time I put JB water Weld on the threads (It can be chipped off with a chisel) Lets see if that works!
Hurry everyone go check your shock and see if your nuts are on the wrong end