I just bought a new MillerMatic welder and my first project is to build two tow-behind aerators for next season. I plan to make them similar to the split shaft Claussen design, but I want to go further. BTW, they won't be for-sale, so there won't be any patent infringement issues. I'd like to come up with a design for a mechanical lift setup that will force the travel wheels down without having to bring them down physically, like when I want to transport the unit or when going around corners, etc. They will be towed by a Z, so there won't be any 3-point hitch to use. I had toyed with the idea of adding a 12v. electric hydraulic system, but I think that would drive the cost up a bit higher than practical. I'm sure some of you out there either make some of your own equipment, or maybe you know those who do. I doubt my idea is new, so I'm hoping this has been tried successfully by someone else. I'd like to hear everyone's ideas and suggestions on this. Thanks.