I am extending the hearth. Leaving to pick up the Micore as soon as the wife gets up. I am going with the liner and tee. It looks like the snout of the tee will just about be touching the top of the fireplace opening. Will this be ok. It "appears" to be masonry. I could alway move the stove back into the fireplace opening more, but that will hide the stove more, make the cleaning more difficult. What do you think is the best idea?