I tried several 3d printed whistles and this one was the loudest, and so I've integrated it into a scale - much like the discontinued victorinox whistle scale.

Also included opposite side plus scales with and without victorinox logo, per the original designer.

These scales need to be gently pressed on with a cloth and a vice. You won't be able to do it by hand but they won't go anywhere once they're on. Not too much force or you could crush the whistle. Open the corkscrew for a flatter surface for the vice.

Recommend .1 layer height. If you're using .6 nozzle with arachne on bambu/orca slicer, you will need to lower the “Minimum wall width” to avoid part of the inlet disappearing, or switch to classic walls (Wall generator: Classic).

v2: updated to have a slightly thicker whistle for more durability.