Great report Warren, I am sorry I didnt see it before, Things get hectic, I had to nominate it. 
The Hollow feeling is sort of unusual with TAC but not totally. We may just be descibing the feeling different. I get more of a “I dont care” kind of attitude. Not really in a bad way but things just dont bug me as much.
Could be your natural chemistry dosnt mesh with it or it could be you need a really low dose.
I agree with what you mentioned in the post in the ladies forum about P75 being a masculine mone. In some ways it reminds me of anone without the arousal part. Maybe I should dilute even lower as you suggested. I will give it a try. 
Tisha