Not sure what the bph rating on the clean grain elevator is but I don't think you will max it out with a 6-30 head. I used to run an 8-30 on an R50 and I ran out of power first. Never overloaded the grain elevator and if I remember right I could harvest over 1,600 bph. On the 62's and 72's the clean grain elevator is rated at over 3,000 bph. How much smaller is the elevator on the 52IJ