Buying another mod would be a waste of money, since you have a ProVari. IBTanks are what I mostly use. They are easy to use and fill, after a few tries...
Yeah, I wasn't really looking at another mod. I am happy with my provari... as long as I've got the time to jam a button without having my hands full to do something else (drive, knit.)
So, I agree and yeah, thanks I think the IBTanked is the right answer too. Y'all are fans of them. But, that says they're probably worth the fandom to me.