it’s just too strong to dose properly unless you’re running quite a high dose of aromatising compounds.
If you have liquid stuff then it’s ok (not that I’d ever use a research chem AI) but trying to split up those little pills is a pain in the arse.
Adex or aromasin is the more user friendly choice if you can get it. Not that letro won’t get the job done, but there’s a high chance of creaky joints and wobbly boners in your future