I am having a terrible time trying to install new baffles in my #121 box stove. I bought new side burn plates to replace the badly warped ones in it and was hoping to continue use the original baffles. They looked to be in good shape with no cracks and minimum warping but they would not fit. I got new baffles but they don't fit any better than the old ones. I can't get the two halves to fit where they overlap. Does anyone have any suggestions?