Relax, I understand you are under a lot of pressure with Hashfast currently no need to take it out on me.
Weak. As stated before I have a single unit on order with KNC, HF, and Bitfury each. It is of no stress I intend to experiment with them (and there is a non zero chance I will damage them in the process). Depending on how well the perform in immersion cooling will depend on if I make a large purchase in 2014 (when prices are lower). I consider all of them high cost prototypes. If I break even a across all three that will be a success.
If someone calls in and asks for an advanced RMA and doesn't return their "Broke One" (Which for this scenario it isn't broke) then they now have an extra module and effectively skipped the lines. Worse yet, they actually took a working module away from someone that needed an RMA (I assume they don't have many modules just floating around).
So set the deposit at greater than fair market value. At $4000 deposit per module RMA I doubt many would be willing to "jump the line" and if people don't want to pay a deposit they can ship first. As far as not having many modules lying around I would certainly hope they do for both future RMAs and the Nov orders (mine included). As others have said if you don't want to do something you can always find a reason why it is "impossible".