I did the same for my homemade aerator a couple of years ago. But mine is a sleeve hitch conversion and not the plug style. It is an old rotary hoe made into the spike style. I have added weight just so see how it does but doesn't really need any. It weighs 175 lbs without additional weight. Just like yours leave slack in the hitch and it works fine. Try to make straight runs but can make some shallow turns. Sure works well in tight areas. Did the same for the dethatcher. I use this with a John Deere 102 with a modified electric lift sleeve hitch and a 3pt. to sleeve hitch adapter on my John Deere 420.