u/FinancialAddiction

I've been pumping for 5 months and have gained a good 0.3-0.4" in length but haven't gained anything in girth yet. I started doing manuals for length about a month ago and it's helped accelerate length gains a bit. For pumping I've been doing 3, 5 minute long sets at 6hg. Have been thinking about doing 5, 2 minute long sets followed by 1, 10 minute set. Also haven't started using a c ring yet. I thought I would at least be able to get some gains before using one. In the pump my base packs the whole cylinder but the rest doesn't. Are 5 minute sets just not effective or what could I be doing wrong?