You really should; those direct challenge can't be unanswered
(Nooooo, we are are pushing here, not at all )
But you might want to concider running NaCL WU on Chrome on older hardware. Those run shorter and give you better control on the overall runtime and powerconsumption: a real concern for all of us.
I was going to go to the instructions at the top of this thread and setup from scratch. Is this NaCL stuff documented as well?