1) I gained an inch in length but lost a good part of it due to overwork. The weigth that seemed to kick in gains was about 3kg if I remember correctly. I think the average weight was about 4.5kg. I can’t really remember precisely, because a lot of time has passed, but for sure you can’t hang a lot of weight that way - I was using a homemade noose style hanger. If I remeber correctly, I added fast the weight, hanging 5 dasy/week, 30-90 minutes per day, doing very long sets (30-60 minutes).
2) that’s impossible to estimate; I gained through jelqs, hanging and wearing an extender, roughly in the same ratio. I think I have done about 1,000 hours with the extender, which is the biggest time/consuming technique. With hanging probably less than 100.
3)While I hanged, I did nothing else but few jelqs to restore blood flow and EQ.
4) I suppose you are again referring to hanging. As said, about 60 minutes per day, 5 days per week. If I remeber correctly I did some weeks (4? 8?) of hanging, adding some weight per week, maybe 0.5kg every week or two; then came the week when I was feeling that weigth was really stretching the tissue, in a comfortable way.
How gains come about? First, let me remember that the penis is tied to your body by the inside; the main components of your penis, CC, are tied to the ischiopubic rami. So to have your inner penis exposed, you should cut, with chainsaw or such, the CC; there should be no reasons though to think the inner penis is completely different than the outer penis, so it can grow and a few millimeters of the inner penis, now longer, will stay out in the sun.
Ok, so how gains come about? I think there are several phases; in the first phase, gains are mostly due to stretched tissue; the same tissue can stretch a bit more. At this point, if systematically the same tissue is stretched, the fibers inside the tissue will become longer. Maybe a few of them will break and will rebuilt longer than before, so after a while you have many fibers longer than before, and you can see gains. Or, and this is what I think is more likely, fibers are just damaged, not broken, and the repairing of these damaged fibers adds length over time, basically through cellular proliferation.