I assume they designed it to be used with almost every tractor they build including the 150HP models. Not all of us use cat 3 implements. The i-match is certainly built strong enough. For us guys with tractors in the cat 1 range, it is a pain. I bought only as I needed them and then every time I bought something else to go in the back, it was another trip to TSC for more bushings. They are cheap, about $5-6 per implement. Get a bunch including extras. One will eventauly disappear into the dirt or leaves never to be seen again. I also started buying some extra pins, lynch pins etc every visit. I now have a little parts tray with about $35 of assorted stuff in it. If I lose something now, the work can still continue.