I mean, I can guess that the reason is that pretty much all eGos can thread 510 attachments and many mods are 510 devices, economies of scale, and all that. And I know about the eGo DCT Mega cartomizers, but AFAIK there are no tanks for these cartos.
Given the popularity of eGo-type batteries and many newer VV/VW mods with built-in eGo threading, though, you would think that in the endless flow of attachments that someone would come up with eGo-threaded cartomizers -- either the 510 diameter cartomizers with eGo bases usable with most existing tanks, or eGo base-and-diameter cartos with tanks sized to fit them.
The benefit I suppose might be kind of thin, but the principal one would be more secure threading for the base alone and more cartomizer filler for one with a larger overall cartomizer. Maybe the finished product with eGo-sized cartos and a tank would be too big for most eGo users.
Given the popularity of eGo-type batteries and many newer VV/VW mods with built-in eGo threading, though, you would think that in the endless flow of attachments that someone would come up with eGo-threaded cartomizers -- either the 510 diameter cartomizers with eGo bases usable with most existing tanks, or eGo base-and-diameter cartos with tanks sized to fit them.
The benefit I suppose might be kind of thin, but the principal one would be more secure threading for the base alone and more cartomizer filler for one with a larger overall cartomizer. Maybe the finished product with eGo-sized cartos and a tank would be too big for most eGo users.