it resides deep down in the quick-disconnect fitting, beyond the tiny ball bearings that secure the mating fitting. It must've flown off just like toomany's did, because I remember releasing the QD before bleeding the pressure on the last cylinder I used it on.

remember kids, bleed pressure first, disconnect quick release second.

__________________
Nate Stanley
(Currently Benzless)
1985 F-250 6.9l 170K
2009 SCION XB 36.5K
2003 LS430 78K
2012 Kubota B 2320