just an idea: After washing my rubbers i like to stand up my blades to let the last water residues dry up.
With the metal sign at the end , the blade won't stand on its own and will need to be supported
Custom Goriki 157x150 Weight: 91g
Freq.: 800 Hz
After some tests I noticed that the blade has 2 speeds. When I apply a little pressure the rebound is high and I feel that the blade is fast. But when I amortize (I hope it’s the right word), the rebound is much lower and the ball floats.