I finally got busy and modified my JD 40" plug aerator. I converted it to 3pt. hitch while at the same time still left if so that the original tow arms can be attached. I did not weld and used galvanized angle and box tubing that was readily available to me. I tested it tonight and it worked excellent without weights in the tray. I was able to get 3 inch plugs with the Bolen's down pressure. I also took the design from a turfvent aerator that I found online. Pretty simple conversion actually. Enjoy the pictures.