I agree. Spacer is quick and easy.

Run a wire to the existing box, splice on an emitter, get creative on how to get the emitter to flash the back of the box and use the routing features of the RP6 to isolate control to individual dimmers if desired. They have 4 presets plus all off, dim up and dim down. With the IR routing you can expand the scene control beyond the intended 4 preset limit because you will have 4 x the number of controls you are using.