Sounds to me like you are in the ballpark with the brace height and the nock point. Most of the time I end up with my nock 1/2"-5/8" above center. If your arrows seem to be flying pretty good, I would add string silencers (hush puppies would be my choice) then play with the brace height up and down until I found the sweetest spot. After you have silencers installed and the brace height where you like it you can bareshaft. IMO you are wasting your time with the bareshafting until you add the silencers. Any changes you make with your string (silencers, string material, etc.) can/will have an affect on bareshafting.