Hey! Thanks for reading this post. Currently, I’m working on a TD (Tower Defense) game, and I’m at the point in the project where I have to design a tower system. At the moment, I have a relatively simple tower system; which at the time I thought was flexible. 
Now I realize that there are better ways to go about it, I just don’t know what they are. So what I’m asking for is an explanation on how most Tower Defense games handle making a flexible tower system. 
To better understand what I’m asking for, let me describe how my current system works:
At the moment, there’s two modules (technically 3). One handles the placement on the client and rendering of the towers, which works well and I don’t think needs any change. Then I have a server module, which handles the request and creates a table that I call “TowerData”. The TowerData holds information like tower CFrame, tower level, tower owner, etc. The tower model is made to be rendered on the client. The way the tower functionality is added is with a “config”, which is pretty much just a module which keeps track of the tower’s levels, range, and function. This is how one of them looks: 
I’m not the best scripter so any explanation on how to design a flexible tower system is appreciated! If you don’t have any idea like me, you can critique my current system–I’m open to feedback! Thanks for your help! 