Well, a month ago I was in the exact same position you were in with uncertainty of how a hypermized R62 would perform in maize. I search extensively on all the forums and only found limited reviews of performance in maize. After much deliberation I decided to take the risk and make all the hypermized modifications, which includes the extended helical bar in the throat, exteneded helicals in the discharge section, and taking everyother descharge paddle out. I took All the reverser bars out and replaced them with disrupters in conjuction with a regular forward bar mounted in the seperator grate. Results: After 12 days of harvesting maize I have come to find out that all the work was well worth my effort. With a 25ft header harvesting 5000lb maize I ran 6.8 mph (all it has in 2nd gear). Although one must know that all pervious settings are thown out. I came to found out that I had to run my cylinder speed at 650, concave at 4 (bout the same),and tighten the seperator grate to 3 wich was perviosly on 7. Once I made those fine tune adjustments it was leaving as much as the un-hypermized R62 right next to me, not much. I just switched to corn so I am in the process of setting and performace rating. In conclusion, my work in the shop was made up in the field. Aaron