hi As i wrote on another thread i did an lm723 based psu, but was a mix of a few separated circuits, searched for my schematic, but no avail sorry
The simplest attached photo is to add an power rectifier in the shunt circuit, instead of calculating an 0.6v drop, you calculate an 1.2v drop
BUT i know you will have a voltage loss, but in my design the current limitter ''IS'' before the power pass transsistors
That way any voltage drop is nulled/killed before the ''regulation'' and i use an foldback system
In a short situation/ maximum current output, the current limitter is working on the reference zenner system in the 723 to slowly kill it / drop it ...
But as many people will notice, the biggest drawback of the 723 in the max vcc input of the 723 (40vdc) the best way like the first post schematic is to use a floating voltage design, that way you can have many voltages configurations possible ??
Adding a constant voltage or constant current mode is not the simplest to add in the 723 circuits, on a few google search, you may see the 723 act as an voltage reference or an adjustable voltage regulator and added current limitting thru other parts outside the 723 chip
The design still works fine after years BUT for the maximum safety and design stability and efficiency, i switched to more professionals psu's like Lambda and Kikusui PAD series
And for me, the Kikusui are the most efficient and compact sized psu's i could have at the time (its a mix of an smps / linear psu)