Multi, I think you are making a newb mistake here. I think you read just enough "to get by". Not taking a shot at you so understand I'm only writing here to help. You mention AI on hand because I don't get ichy nips or anything". Well that's a start, I'm glad its on hand just like your letro should be on hand but you're missing so much understanding in the big picture here. So let's say your estro spikes to 120, you don't have itchy nips and no pain etc. Were you successfull? Sure, a little bit. Could you have been more successful? Of course, the estro spike to 120 also caused a spike in SHBG which robbed up a lot of your test. This means you were maybe 70% successful but that's still a 30% failure. So keep in mind, success has degree's. If you and I both run the same cycle and I know how to run my AI proper and I gain 8 lbs of lean muscle and you gain 5 neither of us failed I just had better success than you.. its like us both building the identical race cars, if mine beat yours across the line by 1 second because I properly mixed the fuel mine is the faster car even though yours was quite fast too. So think about that over 10 yrs of cycles given the individual cycle is relatively small. If in 10 yrs you could have an additional 30 lbs of lean raw muscle due to proper use in cycles would that be beneficial to you? Same here with your prolactin use, would you rather control prolactin to prevent it or fight it once it arrives? Its a short answer for me, control it. The half dose of caber I take twice a week in a 19 nor run not only controls that but it keeps my sex drive and wood in good order as you get later in the run. Not a lot to talk about in debate there in my view. I want the most success I can have for my hard work and proper use of these two drugs in the proper cycles is a must for me in looking at the big picture.