I need to upgrade a 15327 shelf to a 15454 shelf. My ring is a 3 node BLSR ring with one 15454 and 2 15327s running on 4.14 software. The new 15454 will likely have a newer revision software. Would that cause any problems? I plan to add the new 15454 to the ring delete the circuit going to the 15327 and remap them to the new 15454, and than delete the 15327 from the ring. Is it that simple, or what elce do I need to look out for?