hi guy's see if you find this intersting or have seen it
Ihave '97 8780 couple years ago i shimmed the first 5 concaves with a 1" flat bar left rear ones lower way lesss draft tough or dry
last year installed a new rotor which i had custom built
instead of full length rasp bars and stripper bars we cut them to2/3 put first 2/3 in same spot (3spots) next 3 were installed 1/2 rotation between. did same to stripper bars. somewhat like s-cubes rotor in NH. biiiig increase in capicty p.s also went to double thichness skin
rotor was built by Stewart Steel in Weyburn,Sask. any ??? don't hesitate