Nice story.
I like cf’s story about how to mentally cue yourself to react, and basically, When the gun go off, raise your lead arm - all you think about is “lead arm, lead arm lead arm” then when gun goes off, up goes your lead arm before you even know what happened.
I do this in the car at traffic lights- Light turns green, right foot goes down. literally cannot remember the last time i have been beaten of the lights - even by those who try to “guess it” Those who try to guess it - normally start rolling backwards or hit the breaks just as the light turns green - and suffer majorly.
Learn to react - and you’ll be fine and a no false start rule will be the last thing you need to worry about.