Second post of the evening. When I use my MSR gray pump on my XGK shaker jet stove, It won't shut off. Keeps it at a small vaporized blue simmer flame. Is this something a few o-rings, etc can fix? My search didn't see a gray pump rebuild post. Pump originally came with my old Whisperlite, and I don't think it seemed to stay on. Don't want it to leak out in my pack.