the cone on the epower is just cosmetic...works the same with it on or not...just for looks basically. gotta say i love my epower. its upgradeable and works great. has nice heft to it and lasts a long time. and i just ran into a perfect reason why i like it: i absentmindedly put in my battery backwards and fried the manual switch on the epower. all i had to do was order a replacement switch. was planning on buying backups in case it went out on me, but hadnt gotten there yet lol but now i will have a backup and it costs alot less than buying a whole new unit of something else. already ordered backup attys and cartos, and now all i have left to do is get backup batteries, but that's not so important because i already have two batteries. But I will get them soon b/c my recent "doh" moment makes me worried i will screw up the two batteries i have now somehow lol to continue about upgrades, there is a 14500 battery adapter kit and there is talk about making a variable voltage switch as well as an automatic switch! and all you will have to do after buying the epower is buy the new switch, whatever it is =) Good luck and hope I gave you some good info for making an informed decision!
Congrats on the 22 days analog free! May your vaping be long lasting!