OP
Thalassamania:Slogger,
If your TMJ is acting up there is a change that your regulator is too heavy as well as a chance that your mouthpiece is wrong for you.
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Yeah ...I thought about that and at first was thinking of a new reg all together. I'm using a USD plastic that I bought in the 90's and I don't believe it's a weight thing. I know I could always go to a lighter second stage model but the one I have is working fine ...so until it dies or I can't get it serviced any more, I'd rather try a longer hose and a new mouthpiece.
By the way ...the TMJ thing is pretty minor and goes away in an hour or so after the dive. Pretty sure it comes from my frustration while diving when I'm trying to find a comfortable position for the current mouthpiece.
'Slogger