I just read your signature and I LOVE IT, Tierratz!
And, good to know which of the 510's to get. There are so many choices on the site the Fusions or 901s are the ones I look at by default.
Anybody experienced enough to appreciate an IKV atty is an atty lover. I'll bet most are like me and have gone to great lengths to drip or otherwise avoid fill or anything that messes with flavor or vapor and yet I find myself shopping for cartos for their sturdy convenience and juice sopping ability. They're so improved I no longer consider them a distant, disreputable or only-if-I-have-to alternative. About a month ago I never would've typed that though.