Old Pokey you have asked some interesting questions. We do not use growth regulators on our crops, not because we would'nt like to, but rather because they are cost prohibitive here in Canada. We feel that the material is definately roping in the rotor cage, probaly full length but the rub bars over the concaves are not designed to break off when the going gets tough. We have considered modifying the vanes but have refrained to date as we like to move our combines quickly from grasses to regular crops. So a minimum of required changes is quite beneficial. Also changing the rotor vanes on a sts is not as easy as a axial flow. We have also considered shortening the tines themselves, removing some of the leverage the material has on them, but are unsure how this would affect separation performance. The seed is relatively easy to thresh out but does present challenges in effecient separation and combine capacity. We do not intentionally shut the combines down midstream however it has occurred from time to time. lOl 99% of the swaths are fine, it is that 1% that has a little ripple in the swath that causes the problems. We try our best to lay a uniform and consistant swath but as you may or may not know, that is very difficult to do in a heavy, lodged grass crop. Wind, if it was easy to do, like everything else, everyone would be doing it and there would be no money in it.