I filed the nocks down until it felt flush with string. As far as tiller goes ,I don't know. I did not make the bow, I bought it. I will try to make a bow real soon.I own several books on the subject and I'm trying to get up the nerve to take the plunge.Thanks for all the help and comments. I'm sure if I have any questions on building my first bow I will be able to get help here.
Thanks All
Sam