It's a bit crazy as I really was focused on length when I started and when I began hanging I started to see girth gains - which seems to be very unusual. But I wrapped my unit with varying compressions to stop from turtling that I believe also helped girth. I used therabands and ace bandages to wrap - then moved up to the silicone sleeves from stealth. I only started pumping with bathmate about 2 years ago which I believe has added the last girth increases.
I don't jelq much, so it's really just a little hanging now to try and keep my length in tact and pumping with a wrap with the sleeve after all day long.
The girth has been an amazing surprise that I never thought possible but I can tell you my wife LOVES it!