I'm not sure it's optimal but I used to put the string maybe a half inch in front of the motor like I've seen everyone else do. I've Crashed SO MANY HD models because of the string not burning through that I started to move it further up which has the added benefit of holding the blade in, since the rubber bands always bowed them out. I don't believe I've ever had a string not burn through since moving it up. I'm sure one day it's going to not burn through my percentage of success is still going to be much higher then it ever was before.



John Boren