Còi Print Optimized Whistle POW (tối ưu để in 3D)

This design is intended to resolve a failure mode I found while printing pocketriot whistles for my area - While using a 0.6mm nozzle to really turn these things out - I found that the bottom layers were not overlapping enough to hold together well.  Since round things naturally have a large overhang - I'm guessing I'm not the only one.  This model works to resolve that issue - and furthers the printability of these whistles.  Easy 160 per plate on an X1C (254x254mm) done in about 7 hours with a 0.6mm nozzle, 8 with a 0.4mm. 

Open license - unless your a fascist.