I am not to worried about keeping it in an expanded state. I am a grower, which sometimes I can’t stand. However, my most shrunken state is larger than it used to be several years ago.
I personally don’t think it it a bad thing to throw in some manuals through the day. I would just track it and build up.
I wouldn’t advocate just adding 200 additional slow jelqs in the middle of the day. Start small, stay consistent, and build.
I personally do not think that keeping things in a expanded state throughout the day will do anything for increasing girth. Just like I think edging is a cool exercise for other reasons, I don’t think it helps in girth. If the goal is to show more then yes these things might help.
But in my opinion to expand beyond your normal boundaries then your penis needs to be pulled or expanded beyond the normal. This is purely my opinion. I would also never suggest to keep things beyond your normal expansion for the entire day or even long periods of time.
Now keeping your penis expanded within normal limits might help with blood flow, increasing flaccid length, and who knows what else. I just can’t imagine increasing girth by staying within normal pressure range.
In regards to “more is more”, I just think that once the newbie gains have happened that we probably need to increase time or tension. Now this has to be balanced with our own risk vs reward. The risks can be pretty severe if someone is an idiot.