I'm pretty sure for all supplements, with the exception of Metabolic Drive and Surge, that Cy Willson has said for every 12 weeks of use, one should take 1-3 weeks off of that particular supplement. If you're coming out of a fat loss phase, I'd recommend just switching to Carbolin 19.
I myself haven't tried it yet, but it's gotten good feedback in terms of helping people not only stay lean, but also drop some bodyfat while simulatenously putting on some LBM. I also agree with the previous posters recommendations of Carb Cycling for bulking. Take care, and good luck with your goals.