Been following this thread from the beginning. Just took my 2006 2520 to the dealer to perform the front axle inspection (recall) as well as diagnose a power steering problem and fix loose linkage in the FEL joystick. While describing all my problems to the service manager, I also requested the upgraded lift arms. I'm just at the end of my warranty, so we'll see what happens.
I explained to the dealer that I need to run my 2520 with the R3s in the narrow position since I park the machine in a shed with a small door. When I install tire chains with the rear wheels in the wide stance, the machine barely fits threough the door with only 1/4" of clearance. With the iMatch quick hitch and R3s with chains in the narrow stance, I can't raise the 3pt all the way without major rubbing. The arms just clear without the chains!.
For the past 2 years I used the quick hitch and offset the arms to the inside with long pins. The problem with this is that I would bend the pins if I snagged an obstacle when using a scraper blade or the snow blower.
My dealer appears to be simpathetic, but I'll only know next week when he contacts me with an update.