rubberring do you have references to support your opinion that SERMs have a negative feedback mechanism, which can cause gyno? I know some long term resaerch with clomid/nolva with healthy men without reported major problems. As far as I know, that should not happen with SERMs but I don't know what happens with thinks like Epistane...
All I know is that after my third cycle of Epistane/Havoc within roughly an 18-month period, I developed gyno (yes, hard and sensitive lumps) during PCT. I soon realized I wasn't the only one experiencing it after multiple cycles of this specific compound. It's obvious when you run epi that it has anti-estrogen-like effects. In fact, some IBE reps more or less marketed it as a gyno
cure in the beginning. After it had been out for a while, reports of
rebound gyno started showing up on the forums.
My hypothesis is that epi's anti-estrogen effects couple with being on an actual SERM and/or AI in PCT, leads to manipulating estrogen in the body for an extended, and counterproductive, period of time. Yeah, it's pretty much my version of
bro-science, but I think there's at least some validity to it.
Just my opinion, but if you run the 2 on/4 off cycle six times in one year, along with a 3-5 day PCT every time like you proposed... that's messing with your estrogen for about 16 weeks out of the year. Your call, but I think you'll have issues, and trust me... turning to letrozole is not something you want to be faced with. Sucks big time.
Either way, good luck.