GHL says there was nothing wrong with my dark grey Ti... Sent it in with their new backend thinking it was underperforming. I'll have to settle, I guess, until it fails completely. This is likely, IMO, due to micro-crusty oxidation in the threads, where that kind of twist-tweak commonly works - for me too, at least. Even if I had just cleaned the threads, I still at times have to do a loosen-tighten of the backend threads. OR, it's just the nature of a crappy mechanical connection for electrical conductivity. Sure wish that GHL would come up with a way to avoid that. Not that I have a clue how!