Treat my message as only a temporary response and wait for more educated people. I don't know much about hanging, but imo rope looks fine, and as for making it less painful i've heard of people using cushions or some kind of soft things that prevent the feeling of it getting into your flesh directly somehow. But I think the most important thing is finding the arteries and doing the chokehold correctly, because to me the only good form of hanging is the one where you find the sweet spot and then kick the thing holding you in the air so you can't go back, otherwise you will struggle against yourself and might end up brain damaged. I think it's more difficult than it is presented, there are a lot of successful cases but they come with a lot of pain and trouble probably, simply if nobody finds you and you don't save yourself you will die, that's why there are so many CTB via this method, that's one of the reasons.