Today I cut a cement board piece to back-up the soft old vermiculite insulation piece covering the pellet chute wall of my old Whitfield, and took some pictures with a flash firing into the very dark interior of the stove. Upon looking at them on my computer, I saw that the opening behind the chute, which I thought was a factory cut opening, had uneven edges and a welding edge around it like a frame piece was welded around the opening. The opening gets covered with a rectangular piece of metal. I thought nothing of it until I saw how it didn't look like what I'd expect to be factory quality cutting, but what do I know? Can someone tell me if this is factory original or some previous owner's foray into some attempt at fixing something?