Just a few comments,I start out with the good things.The fuel economy of the cr970 is great,we get about 19 hours on a tank(250us gallons).That may seem high but thats about 320 acres of heavy wheat crop.Huge capacity=big header,must have 36' header at least to keep this combine feed.Now the downfalls ,feederchains buildt to light ,broke 2 feederchains in last 580 hours,several neighbors same thing.Altanators seem only to last about 200 hours.Stonedoor still scares me,we put a stone though combine late this year ,damage about 10000 dollars Nh says no to warrenty.We had no problems wih rotor drives at all,got to greese rotor sheaves every 10 hours not 50 hours.We keep looking at the cat 580 as a possible replacement,but dealer is 150 miles away