In the GLV preorder video, Jay said the bottom feed option is not drip-friendly because of the hollow connection. If you take the feeder off, there has to be a hole in the connection for the feed tube and you would end up with juice leaking out if you over-dripped. The top or bottom feed would probably work with cartos without the feeder. I dont know if the top feed has the adjustable connection or not. The tip for the top feed actually looks pretty decent, but there shouldn't be any reason you couldn't drill a hole in the carto or your own drip tip.