the front diff is very quick, as the topdeck doesnt need to be removed, just the 2 end screws..
the rear diff however requires teh removal of the topdeck, then grab some pliers and pop the ball cups for one side shock, and both of the camberlink ballcups. I then undo the four screws which fix the rear bulkhead in place from the underside of the chassis, and flip the whole assembly to the side.
doesnt take more than a couple of minutes once youve done it a couple of times.