This thread is
SOOOO 2010.......... sorry, had to say it.
FWIW, we have three CF guitars. Rainsong WS-1000, Rainsong PMJ-1000 and a recent Peavey Cargo in gloss blue. None of them have truss rods and none are needed, IMO. I know others will disagree, but I put have used lights and mediums and hybrid light-medium sets on all three guitars, tuned them up and down through several different slack key tunings, and have never perceived any difference in relief or action. These necks just don't move, as far as I can tell or feel.