I need to find a larger chisel plow for applying NH3. Right now we are using a 41 foot JD 610 Seeding Tool. I would like to find something close to 50 feet. I see that you can pick up a used 1650 fairly reasonable. What would be wrong with one of these for applying anhydrous with knives? Has or does anyone own one of these? The shanks should be 500 lb but they may be only 1 inch thick.