Well, I now know it's the tensioner :
https://www.fnarfbargle.com/private/...2811~photo.jpg
https://www.fnarfbargle.com/private/...2812~photo.jpg
Did a job on the tensioner arm/housing :
https://www.fnarfbargle.com/private/...2813~photo.jpg
Did a job on the front of the bracket also! :
https://www.fnarfbargle.com/private/...2814~photo.jpg
Standard 6203 : 40mm x 17mm x 12mm bearing remains
https://www.fnarfbargle.com/private/...2815~photo.jpg
The spring in the tensioner certainly doesn't feel weakened and I'd sure as **** not like to be around if it went off. Pivot seems ok. I'll grab a bearing tomorrow and put it back together.
I suppose I'm lucky I made it home because it was probably squealing like a pig for 200km before I hit Albany, and it was certainly "compromised" on the 420km drive home from there.
Belt seems ok.

