It sounds like your machine was set up for corn and will probably do a decent job on soybeans also. I can't say much about barley, but I have experience with wheat. Wheat is harder to thresh, requiring a tighter concave setting and more rotor speed. This produces quite a bit of chaff and chewed up straw which ideally would go out the end of the rotor to your beater. The problem with keystock grates is that too much material can fall through and overload the chaffer. This will probably be the worst when the straw is real dry. Mounting the disrupters in the grates will just make this worse by chopping up the straw even more. If you plan to notil into the wheat stubble without a chopper, you will probably need the disrupters installed and a high speed pulley on the straw spreaders. In that case, I would buy the fan deflector right now before even going to the field. It will let you keep that material suspended over the chaffer (like you are used to with the Gleaners) and save you a lot of headaches. The root cause of light material laying on the chaffer (and eventually falling through the chaffer) is an uneven air blast which is heavy at the front. Might be a good idea for corn, but not the ticket for wheat. Mike