Not sure lightning will be stopped by a 6mm gap in a breaker.
IF your system is plugged into separate circuit(s), (as it should be) simply turn the breaker(s) off, back on after storm passes.
Unplugging power cords from amps/ pre amps
This might be a stupid question but when there is a thunderstorm lightning storm I used to unplug my power cords from the outlet but now I can’t do that because of a lot of things in the way to reach my plugs from the outlets. I want to know if it is ok to unplug my amps / pre / cdp from the female end that goes to my equipment and then replugging them back after. Of course the units are off when unplugging / plugging them back. Ty.