Backcurved centrifugal fan for 540 class motor

It is a blower and it does its job - it blows.
Designed and printed for fun, can be used for areating fire etc.
With my motor it turned out to be quite noisy drawing 3.5A at 12V (unfortunately I cannot mesure rpm).
Requires 6xM3 screws to assemble, 2 of them shouldn't be longer than 5mm (depends on the motor).
Impeller dimensions are φ60x27 and it can be press fitted onto 3.17 mm motor shaft.
Fusion 360 model: https://a360.co/2uSV85f