Unlocking Extraction Skill

Finally I have unlocked Extraction hidden skill on 15 of March 2015. It only took me 4 years, 4 months and 4 days. May be becouse I am mainly hunter and Sunday miner. Achieved with CryEngine 2, Planet Arkadia, Mining Mania 2015 and Level 10 amp for the final push. The bad news is that for the next unlock I will need even more time. Also I mostly mine unamped, but yesterday I felt good mining with amp and this will be bad for my ped card.