Now, I wanted to share some tips on sanding the edges of the cut line quickly by using a sanding drum. This is one of the better ways that I thought of lately. An even better way for the outer and tops edges is to use a stationary sanding pad which is rotary powered.
Using this sanding drum is the best way for the inside in my opinion. Thanks to the commentor for suggesting I should include safety info, so I wrote up some tips and suggestions on my blog here. Leave me any comments if you have questions or think of a better way. Thanks!