I recently bought a Regency GCI60 and did the installation myself. I have been in the HVAC industry for 20 years, so there are no installation issues. The problem that I am having is on the higher heat settings. On "5" the fire gets way too large and starts to soot. I have tried all the combustion trim settings and have backed all the way down with the pellet feed trim. The slider damper was originally set for the manufacturers spec at .15-.17" WC. I have also tried positioning the slider at every position from closed to open. It just seems that I can't give it enough air. Anyone have similar problems?? The manuals are useless and are as detailed as a blank sheet of paper. There are several other fit and finish shortfalls with this stove that I would like to see if anyone has experienced, but this one is the most important right now. Thanks for any input you may have. PS...I am burning Greene Team pellets and have burned about 20 bags in total. The rain cap is covered in soot already.