I went to an auto parts store to pick up a new 10" wiper blade for the rear window of my 2011 SX4, but they didn't have any 10" blades. However, the guy suggested possibly trying a 12" blade, and it works, and I can see a lot more of what's behind me, now, too. My only concern is this. With a larger wiper blade than the motor was designed to handle, is it going to possibly put a damaging strain on the motor ... especially in the winter and wiping away that occasional snow buildup? Anyone?