Had not swept the chimney for my Progress Hybrid since early Spring 2012. Just swept with standard brushes. Soft light brown powder on the pipe, total of perhaps a cup, Seemed nearly as much light powder in the area below where the stove pipe attaches to the stove, when I removed the slip section to sweep from below, as in the slip section and remaining pipe/chimney. Swept from below with standard brushes and plastic bag taped to the ceiling box. No mess at all.
I have just installed a much larger diameter gasket around my cat, as I found the original gasket just fell apart into small pieces. I hadn't though the large gasket would fit in, as the small one seemed tight, but the large gasket fit is easily. I'm interested to see if this new gasket makes any difference in the accumulation of powder on the downside of the cat, or changes the performance of the stove in any way. I have gone back to the original screen in my stove. So far, so good. I prefer the design. Just wish it were easier to install.
I have just installed a much larger diameter gasket around my cat, as I found the original gasket just fell apart into small pieces. I hadn't though the large gasket would fit in, as the small one seemed tight, but the large gasket fit is easily. I'm interested to see if this new gasket makes any difference in the accumulation of powder on the downside of the cat, or changes the performance of the stove in any way. I have gone back to the original screen in my stove. So far, so good. I prefer the design. Just wish it were easier to install.