To my amazement, I've recently watched a coupe of videos on YT that get into some serious deep battery and component analysis - in Ukraine, and I don't think they were official Jaguar dealers, but by god, even though I couldn't even understand the subtitles, they were bloody good. Why do I feel there's noone over here doing the same work ? maybe the Hevra people are doing it, I guess Cleevely might do - but my impression is that they're way ahead of us brits.