I got mine apart. Instead of hammering using 1/4" driver bit, I used a metal rod (shaft) from a Kodak scanner. The same steel rod is found inside printers too. It's the rod that the scan, / print head slides on. If I had a pair of calipers I could tell u the size.
The cone (outer) shell got all dented up by the following methods, but I got it out!
I had the atty snugly grasped by vice-grips, then I got it slightly hot in a propane torch flame.
I made certain that I didn't over heat it. I would heat, then drop-pound, heat then drop pound it over and over so there is no need to over heat it.
Drop-pound:
While the atty is in the vice grips, and the rod up into the atty (atty on top of rod), I had one hand holding the vice grips and the other hand holding the rod (because it slides out easy). I heat the atty, then with little force (mostly gravity) I'd drop/pound the rod on the basement (hard surface) floor, thus knocking the atty assembly out more and more with each blow. Heating in between blows.
Each time I did this, the vice grips slid off. Thus scratching and gouging the cone badly. Next time things will go better, ...I hope.
After enough of the atty shows, all you need to do is pull the rest out with pliers. Meaning you don't need the pound it to death.
NOTE:
I also tried a wooden dowel (rod), and it was not hard enough. Maybe if it fit perfect, and it was short, it might work?
Also, the whole heating thing is a bit unproven. In theory the heat (rapid heating) expands the outside shell more then the inside, thus making the pressure fitting let go (release) a little bit. Who knows, throwing salt over your shoulder could be just as effective.
I hope this helps someone.
I'm not the best at the art-of-explanation, so please pardon my attempt at instruction.
I'm hoping to master the eGo-T atty and re-wind new coils with 36.Ga nichrome, b/c these things are as pricey as a ....!