I found another place Harmans can squeal but only on the PC45's. Where the stir rod goes through the fire box end plate. I had a spare end plate put it on and it was gone. The new end plate does not have the outer bushing welded to it so there is much less surface area to drag and squeal. Also has anyone tried running a 45 as Harman suggests without the stir rod and the open burn pot front? I don't have that front plate and before I cut one down to make one does it work better? more heat, less pellets? More scraping of the burn pot? Just askin'