Q: My 16 yr old hits a nice little draw, but lately he sometimes starts to push the ball straight right. I think he quits on his follow through, maybe trying to guide the ball instead of crushing it.
Yes it could be a fault if he's not finishing the swing but it also might not be the actual root of this evil. If you want to incorporate more of a draw spin we'll have to get the club face to rotate just a bit more on the way down. A great way of doing this is starting with the grip. Make sure that when your son puts his grip on the club that both V's in the grip are parallel to one another and that they both point up between the right ear and the right shoulder (right handed player). Make small adjustments and you'll see big results.