Agarian, Yes, the mods. posted below will most definitely work on your machine.If you are running corn_soybeans,make sure that you pull every other wire from concave if your wires measure 7_8"-1" center to center.Definitely extend the cylinder bars into the discharge area,whether you go with the factory setup or make your own out of used cylinder bars.Either way it is a must to get the material into the discharge area to keep the flow smooth.Reverse bars on a R52,you may have to leave two on,in the center,not at the end.(take them all out if possible)As for the header wanting to slow down,more than likely you have a poppet in the variable speed header valve not seating,a o-ring on the poppet seat,or like Tom mentioned a external leak on the variable speed asy. itself. Hope this gives some insight, Hyper Harvest II