My wood burning insert had an odd ball 7" oval flue collar on it. My chimney reline kit is a stainless 6" M Flex. I had my local steel shop make up a 6" round adapter to replace the 7" oval. The stainless liner to stove adapter that came with the kit fits nice & snug down inside the 6" round piece mounted to the stove. I will be tearing out my entire damper frame to make the entire process easier. Now it will be a crap shoot to get the 6" flex liner down my 8x12 clay liner! What do you guys think....shouldn't this work?