On my S400 the trigger was removed and an adjustable one fitted, so no safety button at all. I agree it is a terrible design and I never used it for fear of tripping the trigger. I used to leave the gun uncocked until I was ready to shoot.

Another flaw in safety design, the HW95 and others with the same safety. It’s in a great position and easy to reach, but, once unset it cannot be reset.