In a space of two or three months I've migrated from a dodgy Gamucci through to Liberro Realis, then a 510 and now a Riva 510 with Ego-size battery (like a Riva) - recently discovered the atty mod (removing the bridge) which lets u drip into dead atties and am puffin away on that mostly- looking to get a tank fitting for this soon I hope- love it!!!