I’ve been pumping for a few years now. Started off with a terrible $15 pump that had no gage. I used that one for 2 years without having any idea what I was doing, but I think that is what conditioned me.
I then bought a bath mate, and after that, a real pump from LA pump.
I would agree with you that something strange happens in the tuge that effects your size in there. I measure myself at 7.5 BPEL, and a solid 7 NBPEL and in the tube I’m somewhere around 6.5-7 … you would think with a tight seal and a pump I’d be hitting near my BPEL, but for some reason that is not the case. My cylinder doesn’t have a ruler on it though, so my measurements aren’t 100% accurate. In the Bathmate I sit comfortably at the 170mm mark, or 6.69in .. still lower than my BPEL. Anyway - that’s just my two cents on that subject.
About pumping AM and PM … I think I should be doing that. At 5HP or below you should be fine so long as you don’t see any negative indicators.
When I pump, about 4 times a week, I usually do two sets of 15 minutes at about 5-7HP. The longest i’ve gone in one session is 20 minutes. I could go longer, but I get a little board. I may try a marathon session tonight.
Any experiences pumpers care to share any thoughts on the difference between, say, a 15 minute set and a 45 minute set? is it drastically better?