My move from 510/eGo type
vaping to 808 was accidental when I mis-ordered a package or two of 808 premium cartos (I guess my first-ever carto order) along with the 510s I meant to get. Curiosity and waste-not-want-not overcame and after a few weeks I bought a couple 510-to-808 thread converters (about $3 apiece). I discovered I really like the 808 premiums a lot, and for the past few months my setup has been eGo battery with converter and KR-808D1 premium carto. Same with my 5V box mod (only with a 3ohm carto instead of LR).
Right now, though, I have a couple 808
batteries and PCC on order as I decided it might be nice to have some native 808 hardware around the house (tired of two connections to unscrew and keep clean) and something cigarette sized again.