I am a new owner of a Hearthstone Homestead soapstone stove. The inside back of the firebox has 4 firebricks. Two are to the left of the 3" cast iron pipe and two are to the right. To the far right and the far left there are one inch openings not covered by the firebrick. I cannot find a picture of how the inside is supposed to look. Is what I have described the way it is supposed to be? Seems like a lot of non-covered area.