I used an air chisel on all the baffles. I used the angled chisel with a point with a 3rd vane on top. Commonly used to remove car mufflers. I drilled a piece of steel rod so a straight tool for the air hammer used to drive pins would fit in one end and the part that normally fits in the end of the air hammer would fit in the other to extend the chisel to reach the deeper baffles. Was fast and easy and if you do it carefully you can't tell anything was ever in there.

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