MoMan-
First off, very impressive dedication and work ethic with your hanging efforts. You deserve to gain.
A couple of ideas to consider:
While I believe in LOT Theory and hang BTC in accordance with it now (LOT = 9:00), at times in the past, I’ve hung SO (also with LOT = 9:00) and gained. It has been noted that ligs “toughen” with hanging, then requiring additional weight to achieve fatigue and further gains. I don’t think I’ve seen mention of the tunica “toughening” with hanging. If I’m not mistaken, Bigger has postulated that (paraphrasing) ‘tunica growth, in theory, should be unlimited’.
The point of that is that while according to LOT Theory, lig stretching gains are supposed to be easier to get for guys with LOTs like ours, IMO, that is true only to a point; at some relatively high weight required for fatigue, the toughness that the ligs have acquired, renders the tunica the easier element to stretch. You might be at that juncture. If you do decide to go with hanging at higher angles for tunica lengthening, I can strongly endorse fulcrum hanging. I think it magnifies effectives of the time spent hanging by a factor of 1.5 at least (swag =scientific wild ass guess).
Having said that, I think that there are 2 very important strategies that have helped me with achieving BTC hanging gains:
1) Using a stretcher to stretch the tunica at high angles as part of a BTC hanging regimen. This helps to keep one’s LOT from falling as a result of BTC hanging, keeping the magnitude of potential lig gains ~constant while gaining! I do it for about 1-1.5 hours 5 days a week (hanging every day, BTW).
2) Using an ADS to keep ligs stretched after/between hanging sessions. I use weights, but I would think that a stretcher could also be used as long as it was positioned down (low angle) to keep the ligs stretched.
Can’t think of anything else at the moment, other than maybe upping the duration of each set to 20-25 minutes if you can. The actual time at fatigue is when we gain (I’m told, makes sense). I’m able to avoid upping weight somewhat by slightly lengthening my sets instead.
I hope this is helpful.