Would be nice if JD could offer this. lexion has had this available here since 1998 introduction. John Deere reps said the feature would not be as helpful on the deere since you can't see what is going into their tailings return. If it's chaff, you'd need more air, if its excess grain, you'd need to open the lower sieve, but so far they don't have any way to determine which to recommend so they aren't wanting to offer the electric sieve option.