I would suggest scratching the 400 and focus on the 50's.
A 400 is not a good "warm-up" nor a good "ice breaker". At smaller meets I prefer to start with an unimportant event to get the butterflies out of the way.
In this case, I would get a good pre-meet warm-up in as usual, but since you are already entered, maybe swim the first 100 of the 400 at 80-90% to test the walls/flags.... test the routine.... then just get out... no big deal... I love the options as a Masters swimmer.
Then, cool down, rest, and focus on the 50 speed for later.
I would suggest scratching the 400 and focus on the 50's.
A 400 is not a good "warm-up" nor a good "ice breaker". At smaller meets I prefer to start with an unimportant event to get the butterflies out of the way.
In this case, I would get a good pre-meet warm-up in as usual, but since you are already entered, maybe swim the first 100 of the 400 at 80-90% to test the walls/flags.... test the routine.... then just get out... no big deal... I love the options as a Masters swimmer.
Then, cool down, rest, and focus on the 50 speed for later.