hay guys, read this forum daily, great place. question; while cleaning out my 15 yearold buck81 (24/7 burner) i noticed slight warpage on the inside back and side walls no cracks and every thing looks to be solid. been over fired more than a few times in 15 years but brought down to proper temps quickly as its an easy stove to control. besides that it looks like the day i got it. am i ok to keep useing it? thoughts.