So our farm bought 3 S680s in the past 2 years. Upgrades from 9770s, all with 8 row chopping. I can't get the loss out the back to satisfy me and I assume the reason is my head isn't large enough for the machine? We run a 16 row multiple planter strip til system and a 12 row head wouldn't work. Would I be better to buy a 16 row geringhoff rota disc? (Been wanting a rota disc for awhile anyway. Wondering if anyone was running one and if they like it. It's a 2012 680. Also curious if I should put in the CM Welding concave insert kit as well? Thanks guys.