I have a VC Reliance that I have only had fired up a couple times for testing when I bought it....the auger speed seems to not change much when turning the heat knob up and down...I took the back apart and the box where the auger(if you call that an auger) is says HARMAN right on it and has an arrow that says "increase" on it...there is also the part between the auger motor and auger that moves up and down kind of like an oil pump you would see out in a field(if that makes sense)....on the end of it is a wing nut that tightens down on top of what seems to be some sort of adjustment bolt. I stared at this thing for an hour tonight while I had the auger running and still cannot figure out how it all works or adjusts...I thought I knew quite a bit about pellet stoves til I seen this contraption. anyone know anything about these?