Upgrade 508 to 722 what am I missing?

[jpt28]

.

 

[boba]

A 722 needs 2 Legacy inputs to function. !48 is nolonger in use so you need to move that 500 to pickup either 129 or 61.5.

 

[aklarvanto]

508D does not have Dish on Demand feature anymore. RIP 10-2009