Couple of questions on ball pumping

Hi all,

I have started ball pumping for practical reasons, my scrotum is high and tight. My right testicle often goes up into my body.
So I want to stretch the scrotum skin permanently.
I manually stretch with an OK grip and then pump at 5Hg for 2 x 30 minute sessions, daily.
Does this routine look good or is there a better one I should follow for better results?

Whilst pumping my scrotum gets stretched about 5 inches down the tube, is there any danger of stressing/over-stretching the Ductus (vas) deferens?
I am not sure how much slack there is on the average man.

My left one disappears regularly and I have a loose scrotum.Apparently it is quite common.

So even if you can stretch your skin,I don’t think it will stop your testicle from retracting.