Kurt, Do you have the big cylinders on your 72IJ If it isnt a Custom Harvester it would'nt have the big cylinders to lift the 12 row corn head. The reason I asked was we just traded for a 12-30 this fall and we had to put the bigger cylinders on to lift ours. The dealer can get them as a kit and they arent as much as they use to be. How do you like your headIJ I like mine, can shell alot of corn. How fast can you run with yoursIJ Mine is a stock 98 model 72 and Ive been running 3 to 3 1_2 in 170 bu. corn testing 18 to 20. But havent really pushed it. Just wandering what I should be able to run with it. later,