I have a fisher baby bear that i recently recieved. I have had a Mama Bear for the last few years in my old garage. I have built a new garage and the Mama Bear is too big so I got the baby bear. My question it is a older baby bear model with the solid ball handle. The inside of the flue is warped from years of use but the stove is in great shape. Do I need to have a new flue welded in or will I be ok with this one the way it is?