I wasn't sure, but I went ahead and changed everything on my planter last winter. All new precision parts in both the corn finger pickup units and bean meters. Cost a lot of money, but sure put up a nice stand. Seemed like I had more of problem if anything planting all those rounds that my refuge was. I'm just an amateur so I thought these parts would give me the best shot. Bought the fancy monitor too, dang if it doesn't tell you just about everything. Sure helps diagnose if you need to adjust the brushes to make it plant better. Can't hardly find a double, but have seen a few skips.