Blink, some good information here.
However, are you serious about doing 24 sets or 7-9 hours hanging per day?
To me this is total overkill. Bib himself I believe use to do 4 hours per day and now believes in retrospect this was too much.
The general advice is 10 hours min per week. I tend to do 2 morning and 2-3 evening sets.
Using your athletics anaology, would a 100m runner practice doing the 10k each day?
I’m suggesting sometimes working smarter is better than working harder.
I’m hanging at 14lbs, I can tell you to get the hanger well set to take this weight becomes quite hard, I dare to think what would happen if I was doing 24 sets at this weight? And yet, you can only target “twitch” fibres so far, normally 50% of max rep weight, right? So there comes a point where hanging with too low a weight is a waste of time.
For example, have you considered hanging then using an ADS device for the remainder of the day if you wish for an all day workout?
I also believe your objective of adding 4 inches in length is also unrealistic. VERY few have claimed and proved such a gain, even Bib himself has never posted pictures, although I do believe him. However, taking Bib he believed he was quite a special case as regards his anatomy after he had certain medical tests and realised his potential gains. Consider, we all have FINITE gains to make from PE. If this were not the case we would be seeing guys with 15 inch dicks, we don’t, because gains are finite, not because some lack the time and effort. The point I make here is you could hang all day, every day at 50 lbs and still your gains will be finite and some even argue pre determined by biological and physical factors.
Furthermore, as much as hanging IS a function of weight and duration, it is also time dependant on other factors. Stretching the ligs is only one part, the skin and other nerves and soft tissue have to be allowed sufficient time to adapt and grow and this will be a limiting factor outside any methodology.
I hope the above points are of some use.