Im having probelems trying to post a new message on here to. anaway I have been looking at an f2 recently.On the back side just behind where the exaust comes out, there is a wieght of some sort that is on a rod that swings back in forth. It looks like some sort of blower for doing soybeans or somthing.what is this meant to doIJIJIJ The machine is a 79' corn plus. it has a 313 flex from a new model.has header hight control and power fold auger.do many F2's have light in the bin to see at nightIJIJIJ thanks for any responces.Jeff