1st, you can get this kind of rubber joint which left behind after you have totally complete your lovely kit. So below the photo show 2 kinds of rubber joints, and the red circle show that's the kind of joint i use for funnel.
In this photo show before & after of the funnel. check on the circle parts
Finally, a simple and easy project which i decide to assembly with the option part "Flexible Wing" as i ever mention in my old post. Ok, now, do enjoy viewing the photo below.