The low profile whistle.

Not sure if it came out well?  If it whistles, it came out fine.  If it doesn’t, you need to tweak the profile more.  That’s a crazy dead simple non-subjective litmus test.  It’s a big-ish file, clocking in at 14 minutes, but this is for the “large” whistle.  I need to download the SCAD file and try out one of the small whistles.