[Double Venom]

Ahh-SO,
see the fitting that holds your "Wipers" to the Arms? Not the Splines. The wipers you have are MADE to change angles to fit just about any windshield, regardless of the fitment of the posts.

If you changed the splines by three or four splines, chances are you could loosen the screw holding the blades on and swivel the blades back into the proper position, then tighten the screw up again.

Look in the gallery of the guys that do have wipers, not many companies use your type of arms anymore. Like I said before, depends on your model, the type of arms, and of course the type of blades.