After much internet searching and a few phone calls I have found out that signal dynamics sells a modulator that can be wired only into the low beam, and that kisan makes a model (P115W-H3-HD) that also can be wired into the RT, but no plug and play modules for the RT. Apparently the RT is acknowledged by just these two. Anyone use either of these products? Satisfied? If another used, please specify product as it seems to be difficult to locate these for our bikes! Thanks!