BFL did allow for upgrade options.
5GH/s to 7GH/s
and
Jalapeno to Little Single or Single.

you would think when ordering chips and circuit boards they (KnC) would order thousands at a time.
I don't think throwing a couple extra circuit boards in the shipping package with original order would slow the production line down.

And even if they did decide to install themselves you would think to add extra work force to keep up the production line original pace.

Well if this were my business that's how I would plan to run it.