I lined the chimney for the main floor insert this year with double wall liner. Since it is an insert and the liner kit only came with a tee I had to buy a cast iron adapter for the insert and had a leftover tee on my hands. This month I pulled a liner down to the thimble for the little Jotul in the basement. After a few hours of cursing and trying to get the tee down the flue I followed Todd's lead and just pulled the liner into the thimble up to five inches from the end of the thimble. I then packed around the liner inside the thimble with Roxul mineral wool and attached a two foot piece of the double wall liner left over from the insert install upstairs and mortared it in with furnace cement. I then attached the 304 stainless tee that I had paid for but couldn't use for the insert liner installation. Since I sealed the joints at every step with furnace cement I lit off the little F100 this afternoon to cure the cement joints. The draw on the thing makes it look like a natural gas stove burning. On a 67 degree day! I now have stainless from four feet over the stove to the top of the chimney and when the two pieces of seamless stainless pipe I have ordered come in it will be stainless from the stove to the sky. And to clean the chimney I will just pull the cap off of the tee, grab the rope attached to the chimney brush and pull'er down. The crap ends up in the stove on its way to the ash bucket. The one thing I couldn't get was the 1/4 inch rise in the pipe to the thimble. To give any drain down a place to live I left a one inch drop in the liner where it meets the thimble to collect moisture until it gets a chance to get burned and shot up the chimney.