If all you are looking for is sound, get yourself a couple of drill bits 12" long, 1/4" and 1/2". Take off the canisters, remove the polished stainless cap (you will have to dremmel the welded areas on the heads). There are two steel plates within the canister one in the middle and one at the end. Start with the 1/4" and drill pilot holes in the center plate. (I drilled 9, 1/2" holes in the center plate) Be careful to get the holes centered evenly because you will then be using the 1/2" for your final. Then drill out the end of the pipe. Replace the endcaps, use a little high temp lock tite on the screws, and replace the canisters. You will definitely get more sound, mine was louder than my BDE Gen III.
Hope it helps,
Steve