I use a Mom and Pop's Submarine Tank on my KGO. I started with 1.7 SC Resurrectors, then moved on to the tank. It's somewhat awkward with the screw on the side, but makes filling a breeze and i never have to worry about it slipping off the carto and causing a mess. To me that was more important than looks anyways, 'cause i too hated refilling and refilling. I also tried the mega dual coil cartos, and as they fit the best on the KGO in actual size, the vape was simply too cold for me and i still battled the same refilling issues as any other carto; though it was a tad less often than a standard carto, there's no condom method available which always proved the easiest/quickest method for me. I also ordered some stardust clearo's, which haven't given good vapor production or flavor at all, but the refill method on those is super easy. I wanted to get the J Tank at first due to it's "grip" on the carto per PBusardo's reviews, but it still seems to be more of a hassle to wiggle the tank from the carto, refill, wiggle back down on the carto, and hope for no leaks after several cycles of this, IMO anyways. If you like the Boge's, Mom and Pop's Vapor Shop sells the tanks with the XL sized Boges that'll fit the tanks, and i believe you can order a pack of them pre-punched also. I haven't tried Boba's Bounty yet, but if it works fine in your Boge carto's, i see no reason it won't work using the same carto's surrounded by a tank...