i currently just finished my 3rd week of sust 250 at 500mg a week, i contacted my source to pick up the rest of my stuff before i run out cause i have only 2 weeks left out of a 10 week cycle. He's a preety big guy, has done this stuff before and knows what hes talking about, but today he told me about something called test sist which i have never heard of. He said its a better version or a stronger version of sust that you take after you finish half the cycle, he said its almost like stage 2. I have no idea what he is talking about, now i am not the most educated when it comes to this, but i have done alot of reasearch for the past few years before i committed myself to doing a cycle. Has any one ever heard of this? should i just stay with the sust?