My 10x14 Slingerland Marching snare drum has no formal muffler. How should I go about drilling a hole in the side of my snare to give it a custom muffler? I'm not to sure how exactly I should go about doing this? I need some tips from someone with experience such mechanical work. I just don't feel comfortable drilling a hole through it. Especially, since I'm no professional mechanical engineer. Is there a way I should do this? I'm afraid I might drill and make the wrong diameter size. Or, even worst; have it crack on me! How should I measure to get the right pocket hole for installing a particular snare muffler?