As previously stated, I am testing an E2 with narrow wick slits. I also stated that it wicks better with the filler ring removed. Now I understand why. It is because the filler ring fits too tight on the plastic cup and causes the narrow slit to close up further on the wick. At this point of the game, this really doesn't matter, but it got me to thinking about something else. I'll discuss that later. But first, look at a plastic cup with a wider slot:
As can be seen, the cup is distorted and the slot is more narrow at the top. The filler ring caused this distortion. The distortion probably remains set that way because of the heat involved. Of course, a ceramic cup will keep this from happening, but that's beside the point.
The point now is that I found something else that perfectly fits the rim of the plastic cup. Before going any further, please understand that this is a test. It is not meant for everyone to do this, or for that matter even try it.
The rubber mouthpiece of the E2 fits on the cup. All you have to do is push it down in there far enough. The outer rim under the mouthpiece goes all the way down to the wick. The inner rim is slightly shorter and does not touch the coil. Tests at this time indicate that the seal is just as good or maybe better than the plastic filler ring. But that's also beside the point.
A thin rubber mouthpiece from an older cartomizer can be used to push the new one down to the cup. The old one will go almost all the way in, lacking about 1/32". Now we're getting to the point. If these two pieces were one, then we would have one single piece replacing the original two. If this single piece could be easily removed, then we could fill the E2 directly from a bottle.
Now I am not suggesting that this single piece should me made from the same type material as a rubber mouthpiece. I have already thought of a few things that should work. You can probably think of a few things too.
For the time being, I am using this frigging rigging on an E2 with wide slots. It is working well with a 510 type battery and fair enough with the higher voltage of a KR8 battery. The rubber will melt with a butane lighter, heheh. However, that has not yet been a problem during actual use.
If any of you kids want to try this, wash your hands and wash these pieces before playing with them. Use soap.