Post your pumping pics

That after pumping how often?
at that time 1to 3 times a week in the summer and 4-6 in the winter months
was using my homemade pulsating pump which helped

than bought a
CTC DP-4000 Digital Maximizer at the start of the year
the rest and stretch of different vacuum levels i believe helps with expansion
 

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You have an gorgeous cock. I would highly suggest Boston cylinders. I love them. Great quality, about a 2 week turn around and there very professional. I just ordered my 3rd cylinder from them. A 3.50x10.