I ended up getting an RJ-60+. I have it set at 10% for a 15,400 fiberglass gallon pool. Only been running it a few days and was on my last 3" puck a couple days prior to turning on the generator and setting the percentage so i'm not sure a free chlorine of 6 is really from the SWCG or some holdover from the pucks.
Water specs right now:
PH 7.6
CYA 60
FC 6
CC 0
TA 70
CH 125
Suspect I may have to raise it a little as we use the pool more and create more load. I did the RJ-45+ upgrade to RJ-60+ for $10 option. Install was a breeze, no issues. Mounted the SWCG after the heat pump, and the flow switch right after the SWCG.