Tube Packing Question
Before I run out and plop down some cash on a smaller tube, how essential is packing the tube to realizing girth gains from pumping? I’m not close to packing my current (2 1/4” I think) tube at 5 hg. I’m currently about 6” in girth at the base and about 5 1/2” midshaft. If my current tube is too large, what size should I drop down to? Finally, what is it about packing the tube that facilitates girth gains? Thanks in advance.