Today, I was trying to add a drone bag to the panbone with very little success. The instrument is a very delicate play between latex pressure on the end of the tube and breathing power so it will take a fairly refined bag to work here.
I am quite happy with my improvised non-return valve on the end of the inflation tube in the bag though, it worked really well and I have a lot of balloon necks around the studio and jacket pockets so now they have have become valuable.
