Tom, You are exactly right about the concave adjustment.It is electric,not hydraulic.There is a guage outside of cab,mounted to front side of grainbin.The way I understand it,there is a cable that comes up to a guage that moves back and forth.Now,if it is anything like the old guage pointer on the fan choke of the old N-Series,I can't see how it will be very accurate.With todays electronics,there has to be a way to have a sensor read where the concave is set at and convert that to a digital monitor in the cab.Come on guys,this is the 90's not the 70's.Maybe Dibber can comment on how well his worked this year.My opinion only, Hyper Harvest II