That was the same with me. I can gain length quicker than girth. I changed up to doing 5x5x3 sets. 5min of [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98]bathmate[/words] 5min of jelqing and then repeating 3 times. It helped some. I slowly increased my sets to 6x6x6 then to 8x6x8. I gained around a half inch in 2 months but then I stopped when I got in a new relationship. Needless to say I lost it all lol. XD. I've started again and I'm only doing 6x6x6. I get great expansion. I do mine at night before bed and I stay thick until I do it again the next night.
Also, by expansion, do you mean the way we are plumped after pumping or the amount of fluid retaining you get from pumping to much? Explain the expansion you mean please. You can get expansion from pumping and not see much but still grow. You can also get expansion but mostly be fluid retention and no growth. If you mean the expansion from fluid more than growth, than you could've already become accustomed to what you're doing and need a new plan.