OLD VERSION

see 2.0 here

The top cap is very fragile around the hinge area, so I recommend making sure it's not stuck directly on the printing bed, and definitely use supports for that part.

Use a thin metal wire to connect the bell to the main body and the slider, it should connect like the NC prop. I tried making a hole in the collar piece but when printing these ended up being filled, so I'd suggest drilling one in.