Just replaced the JD small wire concaves in a 9760 with a set of Howard brand concaves made in Biggar, SK. Cannot believe it is the same machine. Was having trouble with unthreshed/ partially threshed heads in HRSW. Now I can run more clearance, slower rotor speed and get a clean sample. The company processed my order, built them (their inventory was sold out), and shipped them in 5 days. I would highly recommend them .