just so you guys understand conceptually how to do this.

i have 9 BJ's on order.  sold 1 off to a friend.  why?  i wanted to deal with multiples of 3.

what i'm doing b/c of space considerations is repackaging the 9 BJ's into 3 Sierra's.  how can i do this?  simple.  just buy 3 racks and put 3 modules in each.  along with cooler and appropriate PSU of course.  the 3 modules per Sierra daisy chain together to form a single USB device.  i'm going to be using a single Raspi to act as a controller to run all 3 Sierra's.  when the MPP kicks in, i will get 36 more chips and dump those into 12 more Sierra boxes and i'll have a nice clean rackmounted system. 

it remains to be seen exactly how many Sierra's one Raspi can run.  i have 2 more Raspi's sitting on my desk just in case.