the 21 works fine in the quads, I am about a week out and I feel the cyp picking up. I had one of my best pumps ever today from my workout and I can't stop bothering my gf. I lowered the dose to my perscribed 50mg bi weekly injects so hopefully I don't get a drop off. I would like to be on 200mg pw. I am also taking Dhea 200mg every 3 days, I was low on my tests for that as well.