it used to be quite painful because too many were trying to make far too high of concentration levels... if you have quality its not painful at all... our sources have excellent primo... ones i have used...
iwannagofaster new brand, robolics, phurious, bio tech
these are all very strong quality... you can pm iwannagofaster is what i was saying on his... im currently using his but have used all of the above with great success with all...