Ok, usually, this is how you make a constitution. A philosopher figures out a system or architecture that fits the city, nation or federal state.
That was how things was in Sparta, in Athens and most classical cities.
Also in Denmark, Grundtvig, the founding father of Denmark, made the idea of the constitution.
The reason behind this, is, that a constitution is an architecture, a political project.
Lycurgus who made the Spartan constitution that lasted 700 years, was a deep thinker, and a very successful in terms of making the Spartan constitution. The same can be said for the Athenian constitution by Solon.
The artwork comes in, when the constitution should at one hand be longlasting and at the other hand FIT the peoples of the Union.
Essentially what you are making is a political system, that fits the people in it.
In Sparta we were talking about one town, with the federal Union it’s a system that spans numerous countries. The expectation is, that it should live for at least 700 hundred years. That is how Lycurgus did it, and it should be the same goal.
So you see, this is REALLY difficult work. Something that needs time and effort to do. I also need to get in touch with all the nations of the federal system, to understand each of them.
G-d bless the will to do a serious work of making a union in balance.