I never have been happy with the single wall connector that I have. The slip joint is sloppy and the whole thing just looks pieced together and nasty. I have about 60" between the stove collar and ceiling box and would like to convert to a double wall telescoping pipe. So many brands and guages of metal. Of course I would like to keep it from breaking the bank, but I need something sturdy and user friendly because that pipe has to come down every time I sweep. Also, by using double wall, will I need an adapter to connect to the stove collar? And will my Condar magnetic thermo be useless on the new pipe?