I had exactly the same problem. The drawbar is 1 and 1/4 inch thick and all the tow behind attachments, like the cart, aerator, dethacher, and roller, were 1 inch or less. As a solution, I started by adding a whole bunch of washers etc. to the tow behind attachments, but it didn't really work - the drawbar doesn't come out far enough that you can turn really tightly and not have the rear tires hit the attachments. Fortunately, there is a really simple solution! My TSC (and every other hardware/farm supply store for that matter) carries bars that attach to the 3 pt arms. They come in different sizes. The Cat 1 bar is exactly 1 inch thick. The bars have holes in them, to allow you to attach your tow behind attachments, or you can also put a tow hitch on it. Plus it comes out farther than the draw bar does, so you don't have to worry about your cart rubbing against the rear tires. There are lots of pictures of people with this setup on the forum - perhaps someone could post a link for you.