I'm thinking of trying to build a syringe tank using a 510 battery extension and one of the bottom feed hybrid atties. I know they are designed to let it flow back out. Now my question is do they flow back out of the feed slots on the sides near the bottom or would they let juice flow back out of the air hole at the bottom ? I'm thinking of making this just like a regular carto tank except using an extension for the bottom seal to fit around and letting the feed slots in the attie act as the holes punched in the cartos. Now I see two potential problems right off. One that excess juice would just flood out of the air hole and then through the extension right out of the tank. The other problem could be that juice that would be surrounding the attie wouldn't allow the excess juice in the atty to flow back out thus causing the atty to be constantly flooded. Anyone have any thoughts about these or other potential issues ?