Isn't that video of the Double Wammy?  I had no idea there was a Zuki line and tried going up to the left of that nub sticking out.  Couldn't get the SJ up through there and had to go around through the bypass on the left.  Next time though, that line will be mine.

Is this the ravine you are thinking of?  It was just above what I think was the Double Wammy.

The only pictures I have after the stair steps was a short climb here.  We could have missed it though, since we had no real idea where we were going.