Thanks - I never would have guessed. And that also works for me as a "technique" video, because there's good light to see what's happening inside the crack. (Never tried the two-fist method.)
If they had an indoor off-width around NY-NJ-eastPA, I'd practice it.
outdoors: I specifically got on Baby P1 to practice off-width, but was disappointed that the relevant section was so short.
What should I try instead?
Ken