Flexi Custom Code - Awesome PHP Code Insertion Module

Today I will introduce a free module for adding PHP, HTML, CSS or JS code.
Unfortunately the developer of this module has stopped working, but it still works on Joomla 4 - Simply because this module is not complicated.
I have used many Custom modules, but this is the only one that supports PHP language. Make you comfortable to customize the website (Of course if you know PHP - LOL).
This module is now out of JED, fortunately I have a backup. You can download it below:
Flexi Custom Code - Joomla 3 & 4 Flexi Custom Code - Joomla 2.5
I will have a series of articles related to PHP and will use this module.
I'm considering purchasing your File Attachments extension for a Joomla 5 website.
I intend to use it for distributing 3D CAD model archives (ZIP files) to website visitors.
I have three questions:
1. Does the extension generate temporary download links that automatically expire after a configurable period (e.g. 5 minutes), or are the download URLs permanent?
2. Does it support rate limiting to prevent automated bots from repeatedly requesting downloads?
3. Are the uploaded files stored outside the publicly accessible web directory, and are they delivered through a PHP download controller rather than direct file access?
These features are important because I want to protect the hosting server from automated mass downloads while allowing legitimate visitors unlimited access to different models.
Thank you!
^Add a message editing option for users who cannot use this feature.