That post pump feel is addicting. After some not so regular pumping a couple of months ago, I have been pretty regular the last few weeks and I am starting to see a fuller flaccid the next day. It stays full and heavy for a couple of hours after pumping. It then goes back to normal. The last two days it seems heavier and fuller when I wake up in the morning and makes my flaccid hang better all day.
Good luck in your venture into pumping. I have been pretty much following Pumping 101 in the Pumpers Forum.
The lower pressure ( 3-4 ) is working just like advertised.