On the question of permanent gains and pumping, this thread has some good stuff, as well as some links to other threads (see Lampwick’s post):

Why do some say that pumping gains are not permanent?

Start: BPEL 6.5" BaseEG 5.0" MidEG 4.5" | Now: BPEL 7.0" BaseEG 5.75+" -- MidEG 5.0"

Penis Size - A realistic view | Young Guys - SiZE ANXIETY is DUMB |

Is Starting out Lesser Better? | Physiologic Indicators (PIs) to help growth! | Linear Newbie Routine | Sta-kool's Re-tool/Revival mid 2017: Libido, cock, physique | Sta-kool's Icicle Diary Vol. 5