Drum Corps Rehearsal Mapex Drums – Blue Knights WGI 2013 – Full Ensemble Rehearsal 1 min read The Blue Knights rehearse in Dayton, OH during WGI 2013, representing Mapex Drums!! VIEW VIDEO SOURCE Tags: 2013 blue corps dayton drum Drums ensemble knights Mapex marching Ohio WGI Continue Reading Previous Mapex Drums – Northcoast Academy WGI 2013 – RehearsalNext Mapex Drums – Blue Knights WGI 2013 – Front Ensemble Rehearsal