Actually, changing out carto tanks/flavors, is cheap and easy. Take needle nosed bottle, squeeze out juice, put juice into another bottle if it's worth saving, take used carto out & put in a plastic Baggie and label with what juice was used for future use, clean tank, prime a new carto (runs about $1.85), put in tank, fill with new juice. It takes close to 7 mins total.
That sounds SO much easier than "rinse it off with warm water", which is all you have to do with a clearo.
NOT.
So not sure why OP needs to worry about heating elements, ports or all the other info you provided.
Gee, I don't know. Perhaps he would like to be able to make an informed decision on his own rather than having one person tell them what to do with total disregard as to the OP's wants and desires perhaps....
Just a thought.
Or do you honestly think everyone wants to deal with RBAs, and squeezing stuff with pliers back into bottles they had to save, and bagging stuff, and all of that?
It may come as a shock to you, but most people really want this whole vaping experience to be as easy as possible. You may love what you do, but it's no where even remotely close to as easy as rinsing out a clearo and refilling with a new liquid.
Think of it this way. You have a car, right? You can improve both your horsepower and your fuel mileage by custom tuning your car. So why haven't you done it? Too much/too difficult for too little payoff, right?
Same thing with vaping. Most everyone wants better, but most find the amount of work to be too much or too difficult for the minor improvement they're going to get out of it.
I prefer RBA but the OP seems newer, didn't ask about building but just about flavor. You have agreed that clearos have the least flavor and I agreed with the suggestion already made about carto tanks would be a wise next step. Or again, if the OP is not building their own coils yet, my suggestion for best topper for flavor is the Sophia and prebuilt coils can be purchased until comfortable with building.
I'm confused as to why this suggestion of cartos tanks over clearos doesn't seem logical?
Again, it's a matter of cost and ease of use vs. the expected results.
Carto's don't taste MASSIVELY better, the improvement is minor compared to a good tank. Not a $4 tank, a really good one. In fact I doubt most people could tell the difference between a cartotank and a high quality dual bottom coil tank. At least not up until they went to change the flavor and had to spend 3-5 times the amount of time and effort to do that with a cartotank.
I don't understand why you don't understand how important it is for the OP to understand the options, and the pros and cons of those options before spending his money. Do you often buy things without understanding what is good and bad about them and how they compare to your other options?