I've had really good luck with a dremel...there's several different grinding stones that work pretty well for baffle work...its really easy to change a wedge into a bullet.
DO NOT USE THE DREMEL ON THE TIP OR RAILS...I've got several hundred dollars ruined downstairs by trying to thin out rails....I suck
DO NOT USE THE DREMEL ON THE TIP OR RAILS...I've got several hundred dollars ruined downstairs by trying to thin out rails....I suck