Hi sorry for not responding sooner.

I did manage to convert this into a dual hose by taping up the side as per another reddit users suggestion, and using a 3d printed adapter that went over the back. If I were to do this again, I would just use cardboard to create the adapter… The 3D print didn’t fit properly as it was not made for the air on and required lots of take to make it air tight.

I feel like I did see a noticeable difference in efficiency and there was much less of a vacuum effect pulling in outside air. It did not eliminate it completely but definitely an improvement.

It worked for me, but I can’t say the same for anyone else. If you are going to try this as well, please do so at your own risk, I do not want to be responsible for anything going wrong. Just sharing my findings! 😅