Haven't fired up my wood stove since I bought my house. Pipes still in great shape. Slightly discolored at the top (black piping) before it goes through ceiling out the roof, but quality does not feel/look like it is compromised. My issue is where the pipe connects to the stove. It goes inside the stove and 3 screws around secure the pipe inside. What has me worried is it I shine a flashlight (inside the stove) up the pipe, I can see the light flaring out the sides. Should I high temp silicone this, fire cement, or am I just overly worried over nothing? Thank You.