Just bought my first RTA (sorta, some don't consider the Atlantis as rebuildable). Anyway... I just bought a new flavor and I'm getting tired of the one in my tank at the moment. Unlike most rebuildable tank atomizers, this one uses replaceable coil heads. If I wanna change flavors, does this mean I have to change out the coil head as well? The coil heads are super pricey and I don't wanna buy a coil head every time I change the flavor. Can I vape it until the other juice is gone and just pour the new juice in with the same coil head?