hi guys lovin this forum, got a few questions regarding ego e cig. I really fancy getting one but not sure which one to go for, I've got a sky cig which is rubbish i need to step it up a level & move on from the "it looks like a cigarette style" I want something easy to maintain with long battery life. my question is, does the egos take the same threaded "510" cartridges that I use on my sky cig because I have got loads of cartridges & I find it easy to top them up with juice, my other question is about the ego c's replaceable attomisers how long do these last & are they easy to maintain, last question I fancy one of those clearomisers & some feed back on these would be helpful, oh almost forgot does it make any difference if its made by joytech because there is a massive difference in price.....thanks you guys do a great job for us vaping noobz...!!! 