looking for a place to buy HS RY4 in bulk. Obviously RTS is the only option for >50ml but after reading nearly 200 pages of this thread it appears the consensus is RTS is diluted or inconsistent, correct? I have been using the 10ml bottle I got from bullcity vapor at 3% but if RTS would require 6% then obviously the math dictates bullcity or buyhangsen as the better deal