I bought an origional z plugger. Not enough holes, couldnt penetrate my red clay soil, unless it rained the day before,terrible on hills. Its been sitting in my building for years. It has a hydrolic spreader on it. Great for spreading pellet lime.
I bought the toro standup(lawn Solutions) from the origional inventor. It works great. It will last many years.great value.
I also havs a lawnair 4. I bought it in 1984.
I also built a 5 foot wide tractor mount (3point hitch), aerator, out of Ryan tricare castings. I used this for many years, but it needed extra weight to penetrate the soil, unless it was irrigated...total, with weight ...probably 1600 lbs. I havent used this since i bought the Lawn Solutions (toro)