I used one of these blades in my 1587AVSP while I was modifying the dash of my '83 Toyota Pickup to accept a new stereo.  It cut nice and clean - no filing was necessary.  It was also very easy to control while making the  cuts.  I had to "run the edge" of one side to make the hole about  a blade width wider - no problem.  I even had to saw through a thicker  frame member behind the dash, basically freehand, nowhere to rest the  baseplate of the saw.  I just hit the piece with the blade at full speed  and went right through it, just where I marked it.