pwede
get another bass drum of the same thickness, pref if they are from the same brand (bass drums differ in diameter too depending on the manufacturer) and i can do it for you
simple lang naman, cut mo one side nung 2 drums para maging flat. tapos gamitan ng router with rabbeting bit yung flattened areas para mas malaki yung glue area. glue and dry. finally, refinish the bass drum