Have run M3 Spike and A2 spike. Both would cut beans way longer than should after dew fell. Poor performance in 17%+ corn, good performance in dry corn. Wide spaced, high profile hardened rasp bars in G. Channel concave bars in 1-3-5 and rasp concaves in 2 and 4. May say over threshing but works great in all three crops. Teamed with a petterson airfoil chaffer and long finger chaffer extension.