One more question. What type of hanger do you use for that 8 hours? I hope you remove it frequently to restore blood flow.
It just usually happens, that you reach a point of diminishing returns when you do too much of anything, and PE is no exception. As a matter of fact, many guys who do less PE time then you do actually suffer a reduction in cock size as the cock tends to retreat from overuse and abuse.
Your pump times of 10 minutes are just fine and the pressures you use should not cause any discomfort or bloating of the outer skin. But I would seriously consider cutting back by at least half on your stretching and jelqing. And even then, your total program is still very aggressive and probably too much.