Anyone have any experience with the John Deere 7000 corn planters. Looking at a 4 row conservation model, I just don't know anything about them. We have planted our corn with soybean in a mix and used a No-till drill the last several years. We would like to plant straight corn plots in some areas and have been toying with the idea of a corn planter. A planter that can be transported between properties is a must. How steep is the learning curve on one of these?