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Disassembled blowback housing and nozzle: Nozzle is sound. Air seal between nozzle and piston head is perfect as far as I can tell. Rocket/floating valve functions fine manually. Took nozzle apart. O ring is good on the rocket valve and it seals properly when closed (blow tested compression on the rocket valve and piston head). There was a little rust and corrosion on part of the rocket valve spring I cleaned that and lightly oiled it as well as the o-ring. Cut two coils off the recoil spring as it is wicked stiff thought maybe gas pressure had trouble overcoming it. Now I reassembled and tested it still has random blowback strength performance hasn't appeared to change or maybe a very slight improvement as it hasn't actually jammed up again. Maybe I'll get into the hammer/valve knocker next.
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