I started pulse pumping with an electric programmable pump and a GX-pro shaped cyl - about 4 months ago and I’m thrilled! Started with a 2.0 and recently had to go up to 2.25 as I totally packed out the 2.0 after 40 min or so. My wife is loving this too. I don’t care if it’s permanent or not. I did hanging with bib for over a year on and off up to 25 lbs - tried vacuum hang too but kept getting blisters despite trying all kinds of pro tricks, wraps, caps - etc - one blister took 2 months to heal and left an indented area - no more - had some gains as the exit point defiantly lowered down - but pumping - which I thought was useless from my reading - is amazing. Sex never better. Really fun. Highly recomemend pumping to anyone frustrated with PE.