I just know the collector's will cringe and cry out, but the only windage adjustment available with the 96 sight is to ever so slightly bend the front sight blade in the direction opposite the way you want the bullet to go.  I have done it, the steel blade isn't likely to snap.  Depends on how far off your are, but mine only took a few thousandths at most.  I used a small crescent wrench.  I am not responsible should you try it and break your blade though.