I will say this as well...I prefer Aromosin/Exemestane over any other type of AI. The benefits of the increase in IGF levels, hardening effect, it will also help out your free to bound testosterone ratio by lowering levels of SHBG by about 20 percent. That will relate to greater muscle growth.
Another note...it will only shut you down to 85% plus or minus, which is great, since you wont impact your joints, and other body functions needed by estrogen. Letro will shut it down to 98% which is over kill.
When you come off of Aromo...you really won't get anything of an estro bounce which is great, if your gyno sensitive.
When I do my research...i use Total Research, who is a sponsor here...they have pellets at 25 mg, which is perfect for this type of research protocol.