I just finished replacing all three reel motors and the power driver board on my W?D.
All three reels spin, but I'm having a problem with the right reel opto not reading. I swapped out the opto board with another reel and the problem didn't move with the opto board, so I'm rather certain its not an opto board issue, but I'm at a loss as to what to check next.
Another issue I'm seeing (not sure if related) is that reels 1 and 2 tend to jerk a bit during the reel test (and the optos change state as expected) while reel 3 tends to turn smoothly in test (though doesn't register any opto state change). All the reels move smooth at power on and during play.