Yea "Mightymouse" I agree that happened to me the first time I used letro I almost shat myself I used big doses of letro I just wanted the gyno gone but I payed the price low sex drive sore joints big mistake!
U say you've neglected an Aromatase inhibitor (AI) on cycle then used letro at the end to kill it, thats what I'm thinkin if I get a lump again on cycle I'll use letro only at the end to kill it, I do have arimidex anyways just incase it's weaker.
Do u think the lower yr bodyfat is on cycle the less chance u have of getting gyno ?