4-ad doesn't aromatize directly but what converts to testosterone will. Since TA shuts you down HARD and FAST what small amount of 4-ad will eventually aromatize shouldn't be an issue during the cycle. I'm also convinced after my experience with injectable 4-ad-ec that it has intrinsic activity. Assuming the invitro studies are correct on the percentage of conversion (~15%) and there is no other physiological limitation on conversion then my gains can't be explained solely by conversion to testosterone. Even at my dosage of 100mg ED(700mg/wk) that's only 105mg of test per week, which won't do squat for bodybuilding purposes.
nhbgorilla,
Personally, I would just make an injectable TA and if you just need a libido boost go with the transdermal. Using a transdermal TA is a waste of a good drug IMO. Any time you use TA you'll need clomid for post cycle recovery. My next cycle may be a TA and 4-ad-ec injectable cycle.