Cool videos on 570 Curve Tracer
I was not aware of this YouTuber (TomTekTests) until I stumbled across this video on a 570 restoration.
Here is part 2:
Makes me want a 570 now. Although I have a 577 and an Eico 667 for which I intend to apply Dennis' mod (and I assume that it's much more flexible for testing a variety of tubes given all the socket types).