Thanks TTAndy - this is an awesome guide... need more like it for other TT products considering the manuals included with the products dont help for troubleshooting much.
So, based on your great pics, I think the problem is that there is NO o-ring in my unit... please see this vid and confirm. I could just be not seeing it, but dont think that my eyes are wrong
https://www.youtube.com/watch?v=A1o3rHJmAwY
If that is the case, would it be easy to have TT Support just send me a new o-ring?