I had errors in my DM GM with getting buggy with 3 numbers. So I took the main project (with the last update in 2016) and created a function that creates the 3rd number.
The function that does this by default the creator did it in an ugly/difficult way, so I didn't bother to fix it, because it uses mathematics to create the numbers.
If you know how to fix or even create a more optimized function, fork the project and create a pull request.
Github link:
https://github.com/pushline/Advanced-Gang-Zones