Prior to purchasing the kit, I contacted Pitbull. I was interested in a factory-seconds kit, and expressed this concern:
"My concern is that the grain on the back of the neck appears to be off-centre. In my experience this causes it to twist as the seasons change."
They replied that the could not swap necks between kits, so I paid for the full price kit instead.
This is the neck that came with it:
Click image for larger version. 

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