Persist + may have made a difference for me on my FRU replacement, it was (being returned due to buggy HW & getting a new phone) working much better but had no time to test everything on 442.
Moto X, Razr M & msm8960 STUFF
 
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My xt907 Noob & Goodies links

My Moto X / Ultra links

Using TapaTalk or Xda app: You Blind!, Get a Real Browser!

Android File Transfer SUCKS! Is there a no root solution for Osx? I am resorting to Parallels DeskTop-W7.