Time for one last plug of the performance of Carmina Burana by the Des Moines Symphony and about 225 singers from Drake University choirs (including me, in the Drake University Chorus) this weekend at the Civic Center downtown. The Saturday show is at 7:30 p.m.; the Sunday show at 2:30 p.m. And as Ed Sullivan would say, it’s going to be “a realllly biiigggg show!”