Since upgrading to the Hopper w/ Sling and 3 Joeys, I'm wondering if my old DISH 21.1 remote can be made to work with it so I can have a spare remote? The 21.1 still operates the volume on my setup since I'm running sound through a Sony CT-150 soundbar but the other functions won't work. I'm just checking to see if it can be made to work before I go and order a second 40.0 remote.