hmm... thats a lot of superdrol molecules you got there haha.
anyways if you're REALLY concerned about gyno get some aromasin or arimidex. leave the letro alone, imo. OTC stuff isn't really worth it either imo.
run it at a low dose and up it if you really feel like you need it. IMO you should always taper on/off a stronger Aromatase inhibitor (AI) (stuff thats not OTC) to prevent estro rebound. that could cause gyno in itself.
to make sure you don't go overboard and kill all your estro, start way small and taper up till you're comfortable then taper down when your cycle ends.
that being said you do need some estro, so don't super dose it otherwise you're just gonna feel like shit and have destroyed joints, etc.