Get your JD 50/60/90/Pro-series drill to work the way it should. The biggest downfall of these drills is how down-force is applied—the rockshaft twists to compress a big coil spring on each opener. In order for these openers to work correctly, your fields must be laser level. Even 1/2” depressions give them fits. Get perfectly uniform pressure, on every single opener, throughout its full stroke. The result is better cutting, less hairpinning, holding accurate depth, far less sidewall compaction and avoiding misplaced seeds from sidewall blowout. UniForce customers are oftentimes able to reduce their seeding rates as well as see yield advantages!