Anyone use these round bar concaves on a 21 or 2388? Had issues in wet corn or when frosty or snowed on corn leaves were melting. I run OEM large wire now with every other wire out on 2nd and every 3rd on the 3rd concave. 2nd one plugged solid with leaves and first and third a little. Mechanic said they now have round bar concave 'update' for the combine. Suggested running it on corn and beans. Any suggestions?