I've done the same thing except I cut the whole baffle out! the power gains are pretty decent especially in low end, noise increases alot as well.
However not sure if this was a one off but the silencer exploded! the gasses built up in the can and couldnt get out faster than they were going in. This added to the poor quality welds caused the silencer to explode, I would still recomend modifying the baffle, but this time leave a little bit of in there!