I have A 9750 and last fall I took the small wire concaves out to put in the round bar concaves. The small wire concaves have three filler plates on them. There are two at the front of the first concave and one on one of the back two. My problem is I can't remember if the filler plate was on the second or third concave. I would also like to know if there is any place around that rebuilds these concaves.