That's a late tomorrow evening activity for me ... will report back.

 

'Twas the valve. So, I removed the strut, there was pressure built up between the strut and airline inbetween the valve. Service tested the valve with the gap tool, "raised" the RR, and felt a trickle of air flow. Kept doing this for about a minute, something popped loose, and now the valve is working.

Thanks for helping me troubleshoot, got to the root cause. I can only guess that maybe one of the o-rings got stuck in the valve and hopefully now it is loosened up. I also believe that pressuring up against atmospheric pressure helped to relieve the blockage as opposed to pressure already built up within the strut.

 

Odd.. I think this issue will come up again though. Something might be off with that block a bit.

 

Your intuition was right. There was a desiccant bead in the corner valve. I have since swapped it and installed the Arnotts. The suspension hopefully is almost as good as new now.

 

That is ever more odd since the desiccant is contained in a well filtered housing. A bead can not make its way into the system unless someone did a total **** job on a compressor rebuild and bead got into the system? Color me confused. None the less, at least you know the cause AND it is working!