80% scaled Air Raid Siren by MlePh

This is a remix of the Siren by MlePh.
It is scaled down by 80% to fit easily in a 200x250 bed.
But once adjusted, it is VERY loud! (completely saturated a phone mic at 2 meters for example). "SirHaScaled v20.f3d" is the fusion360 file.

I used different ball bearing (mostly because I had them):
- 5x (4x10x4) : MR104 : https://www.123roulement.com/roulement-MR104-2RS.php
- 1x (12x37x12) : 6301-2RS : https://www.123roulement.com/roulement-6301-2RS.php

Changes compare to the original are