HI from down-under, can someone tell me if you get good enough coverage with the standard straw chopper on a JD 9750 to cover evenly behind a 35 flex front in cereals?....we grow fairly heavy crops around 70 bus in wheat and 85 in barley with alot of straw,and after last harvest we had real problems getting thru trash left behind with just spreaders for planting, so going to a chopper this year,any tips on step-up of chopper appreciated!!