Not getting much good info from user guide or dealer, doesn't call. Very good feature but can't figure the calibration. What good is it? Settings are:Bag size 40#, hopper size 40#, then a calibration percentage. What percentage should it be? I was thinking my feed rate which I was told by the store janitor to keep it on 50%. I really like the scheduling mode, I think it actually saves fuel' Haven't figured how to dowmload the software update, I tried but I can't things to work.