I have pretty much come to the conclusion that I do not like bottom coils. I tried the SI version of the T3 and hate it. Very cool and flavorless vape after a few puffs. And it leaks like crazy. The Nano was nasty right from the start. And the CE3/Phoenix was ok while it worked. But they are a PITA to fill and they leak after a few uses too. I really wish someone would come out with a bottom coil that performed like a top coil. The thing I don't like about top coil is constantly having to tilt to keep the wicks wet. And the bigger capacity top coils are pretty much useless once they get to about a 1/3 juice left. Kinda defeats the purpose of having a bigger capacity.
Yep, I'm with you on both counts. Truth is that I don't know
any clearomizer that performs well at lower ejuice levels. However, keep in mind that this is equally true for cartomizers, you just don't see the reduced level. When I go out I still like cartomizers, but to me, when they hit the lower level of vaping performance or get to that "burnt" taste, they are actually almost 50% of capacity, as a new carto takes about 20 drops of ejuice, but when I refill, they seldom need more than 10 drops.
While I have vaped a Triton tank down to 30% or even less with decent vaping, they certainly work best when topped off.
The few bottom coil clearomizers that I've used universally leak...if not at first, pretty quickly after usage. While hot hits are less frequent, on the other hand cooler, lighter vapor has also been the case. I might pick up a couple of T3 vGo's just for variety, but IMHO the Triton tank is about as an effective a vaping solution as I've seen. To date (and I vape a lot!), not one has leaked a single time. As long as you make a habbit to check the coil seating when topping off/refilling, problems should be pretty rare.
Some folks claim that the Triton wicks best if you trim about 1/4" off them, but I have yet to try it myself. No clearo/carto that I've used is 100% perfect, but these are the best that I've used to date.