Hi there!
OK, if I understood correctly your question, here’s my answer (althought I’m not even near as experienced as Guiri our Bib):
Your max weight is 20lbs. You hang for 30 minutes, rest, and hang for 15 minutes. Sorreness sets in. If you want to make more progress (if you have the time for it), then you should do another set of 15-20 minutes with less weight, for example, 15-18 lbs. This way you’ll get even more sore. And the more sets the more soreness sets in, although you should never beat up your dick that much.
Now, if you only have time to do this 2 sets per day / session, than I think you could hang more weight next time (1-2 lbs more) so that the soreness kicks in earlier, and you probably can do a drop set for your next set of the day / session.
Ok, this is my view… and I could be totally wrong with this so I would like others (specially the Grand Master Bib) to chime in and let me / us know if what I said is right or totally wrong :)
Hope this helps!
PEace,
UIShrike