When in the set-position I loose focus and my mind drifts off into the surroundings. Other than slowly gaining experience through competing what could be done to work on concentration?
Powerdrive helps 
it really does
But it’ll get easier Thor - I’ve got 9 races under my belt now - and each one makes it easier to concentrate -
try and enjoy the experience instead of putting too much pressure on urself and -
If there’s too much noise going on - put ur hand up , stop and get focussed again
are taking a deep breath in and holding it till the gun goes off? That may help.
Loser your focus? damn, I get so nervous when I get in the starting blocks and it doens’t matter if it’s practice or a meet.