Fletch,
This is my gap with ZERO trimming. But I did move the whole doghouse about 3/4" forward to make it work. You can see the fender to side-sail misalignment in this picture. 5 years ago my intent was to extend the front of the side-sail to match the fender. To this day, I have done zero fiberglass work on my car. If I lay a straight edge on the door and the fender, it is on the same plane.