Well, I am having trouble finding a sweep or installer that services my area. I had one that did but had a bad experience. Canceled for a refund after he showed up with scrap liner from other jobs and tried to install it un insulated. I may take a crack at installation myself. I already have the stove in the basement on the pad I just need to get a liner installed. I was thinking about getting a Duraliner Rigid liner. They come in 6x48 sections. The exterior width is 6 5/8in. My clay liner is 7x7.25 interior so I am pretty sure it will fit down. The only issue I have is the T. The wall thimble is masonry and very tight. It is not perfectly round at about 6in. Could I connect the 6in rigid liner with an adapter to a 5in T?