we have a international 470 disc has 7,5 inch spacing and is 16 feet wide, how do you get it to stop hilling so much in the center of the rear gangs tried changing angle and small blades, also a person thought that the gangs were to close, we also have a 490 disc that is a 21 footer and that will lay out a very level swath with no hilling, they are so similar but cannot figure out why 470 does this the hills are even kind of rough to drive over and very noticeable, thanks for any replies, also had a lot of questions about hip replacement back in December, finally after 4 months it is starting to come around I thank everybody for those replies back then as that was a very miserable time with the 2 surgeries in less than a week