Thanks for explaining this. Would you estimate that the January units will be more likely to have issues than the later ones, since they'll be first off the line? Or will there be no changes to the components/process that might make the later units more reliable?
A good manufacturing process (with the appropriate level of testing) should result in yield variations, not quality variations. i.e. if the line is running less well for some reason, then you end up throwing more in the bin rather than shipping bad product.