RA 2 retro-fit. As initially designed, the 3-way and 4-way had Maestro MACL-153M dimmers and MSC-AD companion dimmers. As finally installed, some of the MACL-153M dimmers were not functioning properly and were replaced (when all else failed) by RRD-6NA dimmers. (NOTE: the companion dimmers were not replaced). The RRD-6NA dimmers were installed only for dimming functionality, not for RadioRA 2 functionality. From a dimming point of view, this setup functions perfectly.
Now the owner wants to add RadioRA 2 functionality. The documentation for the RRD-6NA dimmers seems to imply that only RD-RD remote dimmers can be used.
My question: Will we need to replace the current MSC-AD companion dimmers? If so, why (since they are working perfectly for dimming right now)?