I have a 4 row 7000 planter and noticed while planting corn the other day that one unit puts out more seed than the others. What would cause it to do that? It is an outside row unit but I don't think that should make any difference. I cleaned my meters earlier this spring and didn't notice anything out of the ordinary with any of them, just put new precision meters on it and they don't have over a hundred acres on them. It's not a big difference but it is noticeable when looking into the seed boxes. I don't know what to do about it, maybe have my meters checked and ran on a test stand? Any ideas?