I recently purchased a JBL regulator m001 with solenoid V002 from a well known auction site, it came with 50x O-rings which is great but after an inspection of the regulator there's, as far as I can tell no "gasket ring" that goes on the end of the solenoid bolt that screws into the regulator! This is my first ever co2 setup and first time even seeing a regulator, so maybe I'm wrong but I see a diagram online and in the JBL web site that shows a ring that goes on the end of the bolt, there isn't one on mine, and inside the bolt hole on the reg' there's what looks like squashed clear plastic that kinda looks the same as the ring that according to the JBL site goes on the end of the bolt!? Sorry if it's a stupid question, it's just this is going in my bedroom and want to be 100% sure the CO2 is not leaking.