Listen Bro' this topic has been broached a million times, do a search. Huckelberry finnaplex is a guru and has posted several answers to this and similar questions.
Bottom line, fina does NOT aromatize or cause gyno, period. I just ran fina at 50 mg/ed for 3 wks then 50 mg/ed for wks 4&6 finally 100 mg for 7&8. My results, tremendous! my sides..none other than a sharp temper, but that wasn't too bad. I also ran 1ml t-400 split to 0.5 ml x2 per wk for weeks 4-7. Test is the ONLY other class 1 you need to run.
Do a search and you'll get more info than you can read in a day.