I’ve been doing this particular routine for about 4 weeks.
I think the ‘squat-hanging’ is a fantastic way to start off the session despite a high LOT. Also, I reckon the JAI stretching technique is a very effective way to grow (for me at least) -although of course I have little to go by so far other than how it feels during PE & afterwards.
Just for pure interest sake, I emailed the JAI weblink Runner’s World to someone I used to work with who I knew had suffered with chronic achilles tendon stiffness -he thought the technique was so good that he has now incorporated JAI stretching into his Martial Arts class (he teaches Karate).