There are probably some of these Rawson carts still around. We originally had the Rawson units (3x coulters) on the Kinze planter pictured. Neighbor had the CIH caddy cart/planter in photo. We later got a cart also. As greasegun said, you could angle the outer 2 coulters on the frame to get more "mounding effect" for fall work. The cart tank held 1000 gal. Some guys had them w/dry boxes on them & a blower system. That would work too, I guess. You can drop the planter off for fall work. It's just a tool bar planter mounted on a 3pt hitch unit on the back. The cart was entirely built by Rawson.

We had these a few yrs back, but no longer here. Ours (w/a JD planter on the back) still operates in our area today.