Good job..
Biggesst issue I have with shooting at DD's is that 90% of the time they jump to flank speed and avoid the first shot forcing you to fan out two or three shots just to have any kind of chance.
Once in a while you catch one napping like you did and then 'doink' "torpedoe was a dud sir"
Just the other night I attacked a DD out of 6 torpedoes fired 4 duds and two misses
After that we just went deep and sailed away shaking our heads.