Is there any advantage to using two cylinders for one session?

When I started pumping two weeks ago I ordered two cylinders because I was between sizes (1.75” and 2”.) I’ve noticed that when I start with a light routine in the 2” and move to the 1.75” I have much better overall expansion and pack much more of the tube. Pressures in the 2” are between 3hg-5hg for 10 mins, and in the 1.75” they’re between 3-6hg for 10-15 mins. Constant heat is always involved.

Is there any real advantage to using two different sized cylinders, or am I just coaxing expansion by warming up with a lighter routine first and the tube size is irrelevant?

You have already answered your own question. If your work in the 1.75 inch tube is magnified by starting in the 2 inch tube then you’ve already answered your question.

If you feel this method is more productive and are observing more productive sessions as a result then those are all the answers you need.

I used to like going from 1.75” on my first set to the 2” but I’ve grown out of the 1.75” which is proof that air pumping does produce permanent gains. But in terms of benefit I don’t think there was much for me personally with the exception of being inbetween sizes and keeping fluid buildup down. In another words if I went straight into my 2” and did three sets I’d have more fluid buildup then if I did a set in the 1.75” and then two more in the 2”

Some guys feel staging as it’s called is a good way to gain length but I never found myself pumping any further in the smaller tube then in the bigger.