Well I ran cem research chems for pct after the 4 weeker as well and found their chems to be a bust. While on my previous cycles I used different research chem company. Only reason I tried cem was they had a sale going on and I could get my chems, pins, and glassware from one spot. Might not have been because it was a 4 week cycle but because I had a bunk ai and shitty serms.