We watched the mechanic in Woods take the baffles out in less than 5 minutes. Allen key (right size) then pair of pliers to pull them out. No more than that. If you've rounded the 'heads' then I guess you'll either have to drill them out or force a slightly larger torx driver in them and hope for the best.
damn, i did use the correct key - went out and bought one. A guy in a dealers said they had a spot weld in them. so, where do i need to drill? is the next question.
i need to liberate the sound of that lovely motor.