I do rockwool cubes into aerocloner into RDWC. I let my cubes sit on a heating pad until a root is visible on the bottom of the cube, then I throw them in a neoprene collar's slot in the aerocloner. IME, if I move them before, the cubes will stay way too saturated and stunt the seedlings. Basically, I wouldn't move the cubes from their isolated spot until you'd actually be getting an aeroponic effect by moving them (or can guarantee they can breath even if your cubve stays saturated).