While I agree with everything Mr. X said about the theory of CKDs and their ability to help you hold muscle, I still would wait a few weeks before I dropped below maint calories after bulking. Your body has an unnaturally high mass right now, and you need to keep feeding it to help hold those gains. If you drop your calories right away, you risk losing some. I only say this if you're coming off an AS cycle.. I believe you should give your body some time to adjust to its new size before you give it a calorie deficit. That's my opinion. Keep eating big and training hard for a few weeks after you come off to try to counteract the let down when you come off cycle. You can't hold all the gains, but you will hold more if you keep eating a little longer. Good luck.