There is a dacal on the machines that states 'Running chopper in corn WITHOUT corn kit (heavy front chute, curtain, rear reinforcements) will void machine warranty. You need the heavy front chute and MUST have the curtain or serious long term damage WIll occur. Some of the cobs will fall to the rear of the chopper and be thrown back up into the top and ends of the walkers and shaker pan, eventually causing metal break up. The curtain makes sure all cobs go through the chopper and the front board is strong enough to with stand the 'foul balls' that don't intially get through the chopper. 71178857-curtain 71178860,71153397 shield Be sure to put the chopper in the small pulley or slow speed as well.