As was mentioned, skip the Osta in PCT. Run it at a later date to see how your body responds to it. Actually, I would stack Osta with a Formestane product and 11-Keto. It will get you ripped and vascular and will put on some LBM as well.
I am currently 8 days into my Ostar1ne, TransForm, XI-KT 6-7 wk cycle (today is day 1 of the XI-KT because of shipping delay). I have been so busy that I have only had a chance to lift twice and do three 45 min. sessions of fasted cardio. Despite that, I am noticeably slimmer, fuller and slighty more vascular. It should get better after this weekend when I get back on my hardcore lifting schedule.
BTW, make sure you work just as hard, if not harder in PCT. Any new muscle you made can VERY EASILY be lost.