I believe they went to what used to be the 9860 rotor belt on all the 70 series? I know it's pretty heavy, I would have to say the first thing to plus would be the feederhouse, it will usually stop before anything else in wheat, in milo I would say it is the rotor belt... soy's I cannot really comment. In green wheat straw the chopper on the 60's would plug but that was HEAVY GREEN straw.
Hope this helps.
Hope this helps.