So you did this while still growing naturally. That does make a difference. I have never heard of anyone gaining 4+” in length or more than 2” in girth. Hard to believe... but intriguing. Amazing. Any links or sources to share?
I can't lie puberty did help with a few inches, but I was PE'ing everyday like my life depended on it. I was doing upwards of 500 wet jelqs three times a week before I bought my first pump, and doing manual stretches for 30 minutes before I started hanging with weights, and 1000 kegsls a day. It was completely different training style that I don't see on here (maybe because it was so dangerous). It was like everyday was a competition with myself and I was training for battle.
I don't know what links you want to see but i can give you my advice which is pretty simple. Stick with a handful of exercises or less, work on one goal at a time for more growth (length or girth for 6-12 months), and train harder less often. I PE only three days a week pumping with different sized tubes, 2-3 sets of 10-15 minutes with as much pressure as I can comfortably take (5"hg for a 2.25" tube and up to 15"hg for a 1.5" tube) and do whatever I want... I watch porn, I masturbate, I go light or skip PE to have sex, and I don't care about turtling, supplements, or any of that nonsense. I rebel against the think-tank and go with what works.