Thanks. Edited my own post to try covering that a bit. If the boards can't fit in one unit, then it's not ambiguity being a problem at all, but explicit clarity which covered this exact kind of situation, right? The quote I posted shows punin indicating he was not (at that time) able to produce a 400GH/s unit, and that 16 boards make up a unit.
What is "fit in one unit"? To use more than 16 boards requires 2+ m-boards. All 400 GH/s orders shipped with additional m-boards.
One UNIT , which punin describes, is 16 H-Cards, which are plugged into 1 M-board, which is plugged into 1 Raspberry Pi. You cannot fit more H-cards on here (H-cards contain the hashing ASIC chips).
This is also the hardware advertised on
http://www.bitfurystrikesback.com/product/400gh-miner-october-2013/If you want more hashrate, you need another, completely separate unit onto which you can plug in more H-cards.
2 UNITS != 1 UNIT.