We did the upgrade with a used kit on our '94 R-72 a few years ago. Wasn't a terrible job but took a couple of us most of a day. The kit does its job when it comes to unthreshed pods in hard to thresh conditions (green soybeans). That said, we've found we can get similar results by just removing the wedge in the concave. Just amazing the changes in overall performance of a combine when making concave adjustments (wedge, clearance, level, up to specs, etc...)...its 95% of the combine I guess I wouldn't install on used machine again however if I was buying new it would be hard to not order it.