I find that to be another advantage to the Red light warm up in that everything warms up from deep within & loosens up in prep for not just girth but all sessions, handy little gadget but nonetheless....
Overview of pics. Base, mid shaft & below glans girth measurements before dry pumping as well as straight after and as comparison some pics of the expansion from a wet pumping session because.......being thorough I guess.
Things to note are that I recreated a session I would do water pumping so as to make an accurate(ish) comparison.
Warm up with Red/NIR light for 10 minutes then do 10 minutes in the pump straight, 5 minutes at a certain 'length' in the tube then increase to a greater 'length' for a further 5. So only a quick session really, I will try it again another time as a 5x5x3 to see how that goes for further comparison.
one thing I will add is that I couldn't achieve the same length in the tube dry as wet. When wet pumping i would do my 1st 5min at 19.0cm then 19.5cm for the next 5min. Going dry I could only get 18.0/18.5cm (& I've gained bpel length since) due to the comfort pad hard digging into my pubic bone. When there is water in the tube there is some skin creep as it gets sucked in with the pressure, with it dry it kind of grabbed at the skin & dug in, not the most pleasant but not enough to quit the session, could just be I need more practise in increasing the pressure in smaller increments or blah blah etc LOL.
Also note, the after water pumping pics are bigger numbers but there is also a litte bit of 'squish' (edema/fluid retention) in there so inflated stats but it receeded pretty quickly, mayeb 2 to 3 hours.