The idea is to figure out wether the CL transistor inside of the LM723 is starting to conduct or not.
The simplest way is to apply a load that just starts to make the output voltage drop then make a small adjustment to the current limit Pot to see if it affects the output voltage.
Measuring the voltage between pins 2 and 3 would be useful.
Ahh I see.
Can't tinker much tonight, but I think you are correct in saying the CL transistor is starting to conduct.
It's hard to tell because I don't have fine control with the current adjust and the voltage drops near full load, so the current adjust pot is already maxed out..
I reduced the balancing resistors to 0.8

each and the voltage shot back up to 5.1V like I have it set. This pulling 12A at the output.
Are the balancing resistors limiting max output current too much?