From '' a good source '' i know they dont need to build... they just let the current ones run for like 1 or 2 weeks before they ship
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
some free btc Always nice to have... Same goes on with BA, butterfly and all the '' suppliers ''there are at the moment.
Ofcourse they rebuild the stock after some time... but i'm 1000% sure they got a few hundreds of miners running at the moment!