The Rockinbetter circuit was completely different to that of a Ric, where it "replicated" the layout of a Les Paul rather than a Ric.
IIRC:
Switch up was the neck pickup, switch down was the bridge pickup, middle is obviously both.
The top row of knobs is Volume & Tone for the neck pickup, bottom row of knobs is Volume & Tone for the bridge.
Again, IIRC, there was little variation in tone from 0 to around 60-70%, then it was a noticeable lift in treble.
The ones that I had were always set with full volume and tone on the bridge pickup, around 75% volume and full tone for the neck, both pickups selected.
Although it doesn't quite sound like a Ric, it gets most of the way there, and the necks are pretty much dead on. Have fond memories of my old Rockinbetter's. Enjoy.