Currently running a 86 1660 very happy with it. But I'm looking at a 93 1644. would this be a downgrade?? Or is the 1644 the same size as the 1660(capacity,etc,etc). Will the 1644 handle a 25 bean platform(40-65 bu.soybeans) 60-85 bu. wheat or a 6 row head 150-240 bu corn. All kinds of help would be great.