Am I "filling" the cylinder correctly?

Hello friends, I am beginning a pump routine and have been noticing that my shaft is not touching the sides of the cylinder walls. The coronal ridge seems to be the only area that presses against the cylinder walls. I attached a photo during a pumping session. I wanted to ask if I have the selected the correct cylinder size. I am 4.3” mseg and the cylinder size is 1.75” in diameter. Scrotum is not a problem and does not suck into the cylinder. One set of 20mins every other day.

Also.. I notice the glans gets a post-pump enlargement, and the shaft doesn’t get much growth at all. Anyway, I really appreciate your help and advice.

Hi Peter. Other longer term pump vets can chime in, but I think if you slowly work up to longer sessions, at low pressure (4-5) with heat you will see the shaft begin to expand. I think if your glans is already “there” it may not be a tube size issue. I personally pump about an hour total, with at least one break for application of a ring and gentle jelqs. It is a marathon, not a sprint. Don’t rush it, and if you are clearly getting only edema rather than true expansion, consider less time until there is less pure “puffiness” than solid CC girth increase. Once packed you will also likely see more tube length. Don’t follow temptation to increase pressure as that’s when blisters can happen!

Wow, thank you so much, I was just about to purchase a larger cylinder, so I am really appreciative for your veteran advice/experience. I’m going to try it out, I can’t believe I’ve been doing this incorrectly for so long now.