v30: v29 remix with source files

So Joseph Zisa is either refusing to share CAD files of his v29 whistle or doesn't have those.
So I decided to make my own based on his.

This one is created from scratch, I only used general idea of Joseph Zisa for that design.

**Please note that the license is different for this one:**
It's **GNU GPL v3**.

Shape Is a bit different and there is no internal ribs so you can print it much faster without loosing any function (probably shouldn't print this without infill).
And much cheaper, because thermoplastic can be expensive.
And it can be much lighter, thus allowing it to easier staying afloat if printed with less infill.
It doesn't need all that extra weight from redundant ribs v29 have.

The sources is there:
https://cad.onshape.com/documents/127002769eb5c2412870432a/w/84e3ee8687bc0f8d1c3acb2c/e/6e75b4f3ba9b11e85a305dd4
K, I printed and tested one.
In my ears it sounds way louder than v29.
Holy shit, it's ringing still.
Don't use it in enclosed room.

UPD: adde