Hi, I was trying to inset the hole for the trigger but when I hit I then b to remove border it removed the back edge rather than in the middle edge where it mirrors. I saw that you had a edge loop at the back of the trigger area where the trigger guard meets the body of the gun. I added an edge loop there & then tried the Inset again & it put the border in the middle where I wanted. Why did the edge loop make a difference? Thx