I have had a 2200 and now have a 23, The only thing I did not let go with the 2200 was the tooth bar and my PATS. It does give you about 3 more inches so your pto shafts may not work if they are cut to length BEFORE adding Pats, but small price to pay for a great product.
The only problem I have is that they are made so thick, my KK tiller has to be tilted a bit forward to allow them on the pins. The pins are too close to the frame, so I have to do a little nudging, still nothing like I did without them. A small price for a great product. I dont use the "leveler" adjustors either, put the anchor bolts thru the arms and away you go.