I've been waiting for one of my cartos to lose the breathing tube but still have the coil working to try a mod I've thought about.
So you burnt a carto? Or maybe you just want a great Go-go dripping cart? Here it is; all stuffing and breathing tube is removed so all you're left with is the horizontal coil at the bottom. Plug the hole at the bottom which the breathing tube was attached to . I suggest JB Weld. Then drill a hole on the side near the bottom, I went 5/16" from the bottom up, and made a hole about the same size as the hole in the bottom of a carto. There is some play here, if you want a tighter draw, make the hole slightly smaller, easier draw, slightly bigger. I prefer to use without a cone on a slightly smaller hole, if I want more vape I suck more from my lungs then my mouth, but you can play with that.
Bottom line; a dripping device that can't leak out the bottom. Just keep the coil wet with juice, just 3 drops at a time and vape your heart out. If you like the action on the Go-carts but haven't tried dripping, you ain't seen nothing yet!