i concur, cycling carbs is the best way to go imo.. i always tried to coordinate the carb intake to match my training regiment as best as possible. for instance, on my weaker muscle group training days .. i'd make that my max carb intake day.. and gradually drop carbs down to nothing as i trained on my stronger and stronger points..
so like i would do
arms day (weakest aspect)/ 350gCarbs intake
No resistance just intense cardio w/ carbs before (this was to build up high end stamina/ 200g carb intake
chest n' frontal delts/ 100-150g Carb intake
legs/ 50-100g carb intake
off / 50g carb intake
back,rear n' medial delts (best aspect) / 50g carb intake
off/ lil as possible carb intake