You may want to check into the price os the SCH system. Went on their website and found the standard kit @ $895.00 for 13'. Bearing style must be more. If you standard guards are not worn out I would go with Crary knives 10 teeth per inch or std Agco knives, you are looking at $7.00 per foot this way, under 100 dollars.. You wont be able to over run a std set up in good beans with an F3 unless you can run more than 4-5 mph. These new systems do have advantages when you get to 25' and wider and a machine that can push 6-7 mph. Unless your guards are gone which will cut 1000's of acres I would put in Crary or Agco knives and the money you save go to feather sheets, bat tines, fingers, guides, and bearings for the auger. No disrespect to any other opinions, just the practical coming out of me...