Thanks, the switch is either ON or OFF (although when the button is only half-depressed, it makes a contact eventually). So, in that sense, I can make it contact “momentary” for very brief periods, but that changes nothing. All my Nanjg AK-47A also “strobe” when no switch is in the circuit at all.

Is a “reverse clicky switch” a latching SPST NO with “momentary off”?

Neither at Farnell, Digikey, Mouser, Conrad, Reichelt, etc. there is a “clicky switch” category, so what type of switch would I need to order from there, if a latching SPST switch is the wrong type?

Your “wire switch” idea sounds good, I try that - although making contact that way is like my very brief “momentary” button presses above.

Also, how would I do that “you select mode groups by waiting for the light to blink on the low mode, then turning off the light or pressing the switch directly after the blink” when that “low mode” never appears?