The local dealer sells almost every new Gleaner with that type of grain extension, it looks nice on a Gleaner and is easy to put up and down for getting into sheds and it adds for example 175 bushels to a R62 or R72 and rises only 25" above the cab when up and only 3" above the cab when folded down !! He has a lot of combines out with this grain extension and no final drive problems. I am considering one for our R62.