Having got to the point of frustration with Ego T's and C's over the last year or so I have purchased so Boge LR cartos (use a mix of Tornado and Twist batteries) and am liking the cartos very much at the moment the only draw back being the frequency of refilling. Have done some research into the tanks but would like some recommendations please on which and where to purchase. Also does anyone know of a vendor who sells pre-punched Boges as I'm not really one for faffing around. Thanks