I installed the E70 upgrade on wife's and my X5. Her's is skipping in the middle and mine is not. I'm quite sure i had the wiper lifted off so no torque on the spindle while installing both, but because of the skipping on wife's i added a little more bend to the spring on mine before installing and mine doesn't skip.

I did notice that wife's goes a little too far counter clockwise and parks around the bend of the glass; this might be putting a dent in the blade so i will be fixing that as well.

The E70 has a smaller blade and doesn't clear as high up but i don't care i'd rather have a working wiper than have the top 1" clear and the bottom 17" not clear!

I will try just doing the spring tweak on wife's and report back what are the results .

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)