I had a harvest bus. for 20 years.  Theya re going broke as fast as alot of farmers.  The only ones staying in bus. are the ones who have been going for 25+ years.  I can't see how it is possible to haul the largest Cat combine.  It would require a special trailer (no harvester wants to spend that kind of $$) and permits to move it around.  (Again $$$).  On top of that, harvesters for the most part hire kids to run the mach. and they would rather teach a kid to run a Deere_CIH that for the most part runs around 4-5mph top speed in the field.  It takes a very good, experienced operator to run at higher speeds and do a good job. I think Cat is after the BIG grower who has alot of acers to cover and wants to do it with one mach.  CM