Not sure where this fits, but it is percussion and it took place indoors, so...
From my understanding Grain Valley and Blue Springs dominated the 'A' levels of HS competition at the event, which took place on April 9, but I couldn't find any official results to verify. Here's what I understand:
Marching Snare solo - 1st to GV
Keyboard/mallet solo - 1st & 3rd to GV, 2nd to BS
Concert Snare solo - 1st & 2nd to GV
Small Ensemble - 1st to BS, 2nd to GV
Large Ensemble - 1st to GV, 2nd to BS
I wish I could fill in results for other schools, but alas, I don't have the info.