Glad you love your 510. But yeah, if you have the money to spend on the Chuck or any other battery mod, go for it, its going to be my next purchase in the next few months.
And yes, the 510 battery sucks as is. I can only get maybe 5 good hits before I have to stick it back in my PCC for a few minutes. But if you spend a decent amount of time near a computer, definitely get a passthrough. By decent, I mean a short walking distance.
I've had a 510 for a week, and haven't even thought of looking back to analogs. Well, that is until I get drunk and realize screwing my battery on and dripping is too involved for that state of mind.
