I currently have a forearm problem from poor form and force absorption from 1 arm swings.  It turns out that the problem was further upstream in my tricep.  It is a hard area to hit with MWOD techniques because the area affected is the top/front edge of the tricep.  Hard to get enough pressure on that by yourself on a lacrosse ball, even against a wall.  Had to use Graston by ART guy, and also am doing home/self Graston every other day which is working well.  The tricep junk is clearing up, and that seems to be leading to downstream relief in the extensors of the forearm.