It is also a psycological issue,
to me, keeping the mind far from my dick for a day or two every week is important, to work out another week, then another month and then another year.
In the past I tried to do it full time but after few weeks I quit and went back to pumping only.
Now, I avoid real pumping ( I do it light as a warm up) as I know when it is nice and swollen I cannot hang.
My unit is smaller, but finally growing for real.