As a side note, it would make for a nice fiber reinforced plastic or carbon piece.
My conclusion was just based on a simple cantilevered steel beam calculation - I haven’t done many of those by the way but what you do learn is that steel is counter-intuitively stiff. So elaborate your design structurally and aesthetically, eliminate the sharp edges, and have a shop make a few spring steel pieces for you, it will not be very costly and see how it turns out.