So my offset box came a day early, it was waiting for me when I got off work today. So it came with three screws and holes for each flange, attaching to the stove and attaching to the liner. One there's no way this thing will screw into stove. Is it ok to just use some stove cement around the flange were it attaches to the flue opening? And what about the same for attaching the box to the liner? 3 screws plus stove cement? Am I missing anything here? Hope to get it finished tomorrow evening. Thanks for the help.