I wondered whether I could print the V29 with Ninja Flex TPE and whether it would work.

The answer is yes and no. The project is a failure: No sound comes out and the cat doesn't help either. I probably should try with a stronger TPE like Arnitel.

Why the cat ? Because I suspected that a V29 with this TPE would not work. At least I now got a cat standing on an advanced mouse trap. It also can be used as window stopper and for many other things.

Source for the cat: http://www.thingiverse.com/thing:683053