I agree, I worked as a design engineer a major combine manufacturer for a couple years before giving it up for farming. Most of the engineers that work on combines couldn't run the things in the field. There were a couple people at the company where I worked that literally traveled the world to trouble shoot customer machines. These were the only guys who knew anything about running a combine in the field. All the engineers would go talk to these guys when they wanted to know how something they had in mind would work. Very few people (farmers included) know how to dial in a combine in various conditions. An Iowa farmer may be able to set a machine great in corn and beans, but how about wheatIJ canolaIJ sunflowersIJ Few people indeed can make a machine perform in any field.