I have a rotor that will no longer stay on the QR 1. I push it down all the way then hold the QR 1 up to full speed for a 3 seconds and that blade will keep flying off.

I am new to the QR-1 ... The blade otherwise looks fine... any good trick to use this blade again? (I replaced it with the matching spare but now I have no replace for "A" in black.

Also is "A" in blue the same as "A" in black (other then colour)?