My Momentum had almost everything on the One Control. A couple of exceptions was the overhead lights in the kitchen/dining area (OC and a Switch), the main slides in that same area (OC and switch) Auto level (OC and the outside control station). There are a couple more things like the bedroom OH light that is strictly a switch and no OC....oh, and bedroom slide (OC and a Switch). The lighting in the overhead of each slide was OC, the lights over the kitchen sink and the TV hutch area (OC), water heater, outside porch light, flood light, accent lights, Awning lights, Front cap light, and the step lights were all just OC.
I decided to add switches for the ones that I used frequently and ended up putting in 6 more switches to be able to NOT use the OC if I didn't want to. I also broke out the overhead lighting for the two living room/kitchen slides so that they could be turned on/off separately. Those two are NOT on the OC but the other six switches that I added are also available from OC. It was kind of involved getting all of that done, but I like it and it's certainly more convenient.
Three wireless switches here, just as you walk in the front door
And three more wireless switches here on the right hand side as you are going out the front door...
Those 6 wireless transmitters operate a series of wireless receivers, and the contacts of the wireless receivers are wired into the One Control Lighting module. Here's a pic of the receivers and some of the wiring involved. Those receivers are mounted on the underside of one of the steps going up to the bedroom, and are almost directly above the One Control Lighting control module. Every one of those switches are tied into the One Control module, so whatever they control, can be controlled by the switches themselves or on the One Control panel or from the phone app
These two switches are also wireless transmitters, and control a pair of wireless receivers. These are what I used to be able to allow the overhead lighting in each slide to be controlled separately instead of coming on when the rest of the overhead lights in the dining room/kitchen came on. It was so bright in there that Rip Van Winkle wouldn't have been able to sleep. Now I can turn on just the curbside slide OH lights, or the street side slide overhead lights, or both if I want to. It's really nice if we are watching TV in the evening. The main overhead lights can be off, as well as the streetside slide overhead lights off, and just have the overhead lights in the curbside slide on. Here are those two switches, and their receivers are also mounted down very close to the One Control lighting module....