Apparently I can't post links anymore but a rep from PES basically said that there was a reason that they switched the main ingredeint in erase and that the new version was a better AI. This was from a thread I started a couple months ago looking for bulk arimistane. He then went on to say that arimistane was a better diuretic then their new fomula but was not as good as an AI. Also got a couple messages about not being an effective AI with bloods from a solo arimistane run and actually increased E. Either way, again this is just my 2 cents. Best of luck.