2NR - inte(rolling the "R" like Charro)estink.
I agree when flushing to get the backs done first to reduce fluid waste, but on a normal bleed, I always did it cross ways. I never checked, but I always assumed that Nissan, like most other cars used a two channel brake system (i.e., connected front and rear from opposite sides) so that in the event you had a catastrophic failure on one corner, the car could still stop. (I know Honda's do) But that's why I crossed. Does the FSM mention anthing about two channels?
In any case, I agree that it doesn't matter if you don't let in air. I'm just anal like that <img src="#/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt='
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