Don is this the concave you are using? I have this Sunnybrook concave in a new to me 760tt, it also has the Sunnybrook enclosed cylinder and impeller. Are you running the concave just as shown in small grains? Does it do a decent job in harder to thresh crops like wheat? I have all the small grains box inserts installed but I am debating setting it up with the back row using the multicrop inserts. Thanks for any info.