Hi Doyle,
Yes, I have had this issue. If I recall correctly, I needed to take about 5 mm off one side.

To widen the slot - I used a coping saw to saw a small section off the guard, and then used 240 g (or higher!!) sandpaper wrapped around a pencil to smooth it off to a similar curve. You could possibly sand the whole lot if you do not have a coping saw.