Alright, since first reading this a couple months back, I've been sporadically (about 3 times a week) training OAC/OAP negatives.
Tonight, I thought: why not do these with feet on a chair to assist? Easy.
Advice: Is this a good step in the progression?
After rereading this thread and the linked Beastskills article (and a link from there), I'm going to also try the uneven pulls. (With one hand on bar, the other on towel).
As far as benchmarks:
I don't really go all out consecutively any more, but I've done 29 dirty pulls, and I can easily do 15-20 super slow dead hang pulls/chins. Max in a day was 135. I haven't timed my OAC, negs... hold on I'll try that right now: 9s right arm, maybe 3s left arm.
Advice/encouragement?
I'd also just like this thread to stay alive

, it's inspiring!