My installer showed me how to do this from the inside last year. He had a one piece chimney brush that was wound around on a reel. He just sent it up from inside and set up a shop vac in the firebox to catch the falling soot. He stated there was next to nothing and that I could skip a year. But, I would feel more comfortable doing it. Any idea what this really nice chimney brush on a reel is? My thought is that I would not have to worry about something separating in the pipe with the one piece design. Thoughts? Thanks.