Vogelzang Auger Motor 80488 Diffrence between 1 RPM and 1.5 RPM I see both listed. Manual for stove calls it a 1.5 RPM, But most I see listed for the stove and under that part Number are listed as 1 RPM. Does it matter? Which should I get? the 1.5 RPM seem to be about double the price of the 1 RPM. I am looking to just pick up a spare. Thanks