SSJs are critical to expand the internal chambers, or rather the internal tissues that create the spongy chambers, to maximize the space.
SSJ reforms the chambers to become larger, while pumping actually forces the tissues around the spongy chambers to become thicker. This is why DLD smacked the crap out of the
SRT theory so magnificently.
Brother HG uses both the OK grips at the base of the penis to achieve the high total time an erected penis, or even a erected blood volume, to stay inside the penis as long as it can. What I do is using my wife's medical tourniquet rubber strip, mainly for comforts, and tighten down the base of the penis to restrict, NOT constrict, the blood temporarily before an erection. Then I get an erection going, forcing as much blood as I can into it. I use one OK strong grip to keep as much blood in the penis as I can while having the other looser OK grip to push the blood all over the penis, especially into the glans since I want it to grow larger than the rest of my penis. Think of this looser OK grip like a C-grip for jelqing. By moving the blood volume up and down using the lighter grip, you are expanding the chambers equally. Some blood will escape. You can use kegel exercises to get more blood back in or a semi erection to force the blood in and trap it there through natural venous constriction.
After 10 sets, you feel like you just finish 20 minutes of
Length Master routine.