I've done it. Drilled the center tube inside and 8, 1/4 inch holes around the center tube. I like the sound, and no harmful effects. It's not quite as deep a sound as the Staintunes or as loud as the 2 Brothers but its a lot cheaper. Start with just 2 holes and keep adding until you get the sound you want, but don't cut the whole ring out. The baffle tube needs some support at the end or it will eventually break loose and fall out. Several have done this, and while you may like it, there's no going back if you don't.