After having the poorest stand ever since starting no till need to make some changes or use more tillage. Small grains seed into undisturbed soybean and pea stubble fair. Small grains into sunflower stubble perfect. Small grains into flax stubble fair. Peas into barley stubble fair.Flax and Sunflower into wheat stubble disaster. Combines are spreading residue well. Small grain stubble fall harrowed. every thing was seeded with JD 1895 drill new blades. Seems stands have been getting gradually worse past 3 years. Any areas disturbed with Gates coulter disc perfect stand.I am considering going back to a shank type drill because of hair pining and cold seed bed.I don't have the man power to cover the acres with vertical tillage. Is the shank drill my best option?10 years notill first 3 with shank drill last 7 disc drill.