I took a close look at these at this years ATA show, they are heavy duty and built well, they are also plenty heavy enough. I dont think they will have any issue cutting into the soil, i have a 34 horse john deere and it wouldn't be able to lift the 5'. Im pretty certain i will be buying the 3' unit this spring. I plant about 6-7 acres a year and i like the idea of spraying only. The guys who designed these have it figured out.