Uncut pumping and stretching

I am seeking advise from senior members as I am uncut and I love pumping. No matter how far I stretch my skin behind the glans once inside the cylinder it gets over the glans due to vacum pulling it forward. Will I get any gains in that case and is stretching with a extender device advisable over hanging as hanging also is difficult.

Pumping can lengthen your skin even more, so hanging. Using a noose-style extender shouldn’t affetct skin, neither manual stretching. Comfort strap extenders attach on skin, so I suppose they can lengthen your skin too.

Skin doesn’t make gains harder - actually, some hangers do believe that tight foreskin could be a limiting factor.

Strangely, I have the reverse effect while pumping. I generally like to go into the cylinder un-retracted and nearly errect. When I come out of the the cylinder, I am fully retracted because the glans has been pulled free and extended by the vacuum.

May I suggest you look into wrapping, or condom pumping, or using a short cut length of bicycle inner tube. These methods might be used to retain the skin back where you want it for a longer period. Or perhaps if the slipping back only occurs after a number of minutes of pumping you could just release the vacuum, reposition the skin and restart pumping again, repeating as necessary.