Gunner
I can't imagine using that anchor myself.It would seem to put the string out of alignment with my eye.
I did know one world champ who stuck his thumb in his ear.
Whatever works for you but make sure all aspects of your form are comfortable.You should attain proper alignment without having to stress any muscles to get aligned.It is having to use the muscle for alignment that will result in poor consistancy.
Make sure you are standing well balanced.If a gentle push will cause you to move your feet to recover balance,you aren't standing correctly.Make sure there is no tension in your grip hand or release hand.Again any force into alignment works against you.
Don't sweat shooting close untill you get it perfect.Only move back when you have to shoot seperate quarter sized dots to keep from busting knocks.
