I've got a couple of kids in the traditional archery club I lead at the high school where I teach that are not getting to full draw/anchor point when they have an arrow on the string. They can do so like champs when they don't have an arrow nocked up, but they release 1-2" before their anchor (which in this instance they really don't have) when drawing an arrow. Their form and alignment in really great, except they let fly too soon. Any thoughts on how to correct this? They're shooting wooden self bows, so I hesitate to do much holding at full draw. Thanks, all!