Client has fluorescent tubes installed in alcoves throughout apartment. System uses Lutron Tu-Wire ballast and a Diva dimmer DVFTU-5A3P. There seems to be no RA2 dimmer that could replace the DVFTU. Lutron Tech Support therefore recommended adding a PHPM-PA-DV module and use RRD-10ND dimmer. If I do that, where do I install the PHPM module? Can this be installed next to the ballast inside the alcove where the fluo tubes are? I don't think the client will want to do drywall work at this point, much less have a two-gang faceplate in the wall with a dummy cover. Thank you in advance.