On topic… from my experience, which is hanging, I have not changed my “free hanging” erection angle to any significant degree, only a little, 10-15 degrees.
I have definitely lengthened my ligaments through 6 months of hanging BTC for up to 28 hours per week. My LOT went from 8:00 to 6:30.
Bib says that the shape of the tunica is what dictates the erection angle the most. Secondary to that is the weight of the erection which under the influence of gravity, causes the erection to be lower and this is where the ligament stretching has influence… less suspension bridge effect.
I am relieved that all my BTC hanging has not produced a significantly lower “free hanging” erection angle. I will admit however that my unit is easier to deflect downward during intercourse. This in turn allows me to go deeper.