I have a Glacier Bay Wood Stove insert manufactured in/installed around 1979. There is no manual for this stove but my question may be a simple one. There exists at the back of the stove a slanted shelf below the flue outlet that is referred to as a baffle or a bank plate I believe. This plate has a noticeable curve to it when it is installed. It is either dipping down or if flipped it is mounding upward. Nothing about this stove makes me think it was over fired habitually to cause this very heavy gauge steel plate to warp so my question is: Should this plate be installed dipping down or mounding up towards the flue outlet? Or does it not makes a difference at all?