Greetings; I don't have a lot of
vaping experience (two months) but I do have a CC, and when I change flavours in an empty tank I tend not to notice a lingering aftertaste from the previous flavor -- I have a hunch that this is a general advantage of BCC clearomizers, with their tiny wicks.
When I change flavours in my Vivi Nova, a top coil design with a snakes' nest of wicks, it's a very different story, and it can take many puffs before the new flavor kicks in.
I need to qualify my comments by saying that i'm not super fussy about flavours; mostly I vape tobacco e-liquids, and I don't find it horrible when different ones get intermingled. Someone who uses and does not want to mix conflicting flavours, like cocoa and apple for example, might have a very different opinion about the CC.
A question about your plan, have you considered other products? I like my Davide Mini (another BCC) way more than the eGo-CC. Also, Variable Voltage batteries are really worth checking out, because the extra voltage can make a huge diff in terms of flavor and vapour richness. Have you considered something like an eGo-Twist or a Vision Spinner, which are very affordable? You can use them with eGo-CC tops, if that's the clearomizer you really want to use.
Regards
Glenn