This was my first year with my R50 in small grains (Soft White Wheat and Oats) and I was worried about not having a return to cylinder. I set the grate to minimum and concave clearance to 1/8". Then put three filler bars in. I had no white caps or unthreshed heads in the grain tank and minimal grain damage. This was 20% moisture, kind of tough wheat. Oats were set the same.
I checked into the return kit with Agco. Would have to buy it part by part, and it was much too expensive. Salvaged off a combine it would run about $1,500. I think I'd still like to have the option especially in small seed crops like clover and I still believe I could get a cleaner sample in small grains.
I had talked to the Agco dealer I bought the combine through about the lack of a return to cylinder and how that would effect performance in wheat and oats. He was adamant about leaving the reverse bars in the rotor as designed. I know this fly's in the face of the prevailing opinion on this site, but maybe he was right. At least it worked pretty well for me.
One of the few things I really miss about my M2 is the ability to look out the right window and see what the tailings are bringing back around. I sure would like that on the R50.