如何构建我的CakePHP管理插件

Question

I'm considering creating a plugin for the admin portion of my application and am seeking some guidance on how it should be structured. I will be using CakePHP 2.5.x.

Part 1:

I will be Auth as well as Acl. Should I be configuring this within /app/Controller/AppController.php or /app/Plugin/MyPlugin/Controller/MyPluginAppController.php?

Part 2:

Let's say I want to access the Post Model: /app/Model/AppController.php from within my plugin. What's the best way to do this within my plugin?

Which one of these files should I create to handle this? Do I even need to create a model within my plugin if I'm just extending the model from the main app?:

//Model
/app/Plugin/MyPlugin/Model/Post.php //Will this conflict with /app/Controller/PostsController.php?
/app/Plugin/MyPlugin/Model/MyPluginPost.php 

//Controller
/app/Plugin/MyPlugin/Controller/PostsController.php //Will this conflict with /app/Controller/PostsController.php?
/app/Plugin/MyPlugin/Controller/MyPluginPostsController.php 

How should I handle the data within the plugin's Post Controller? Am I on the right track with this?

<?php
// app/Plugin/MyPlugin/Controller/MyPluginAppController.php
App::uses('Posts.Post', 'Controller');
class MyPluginPostsController extends MyPluginAppController {

        public function index() {
            $this->Post->recursive = 0;
            $this->set('posts', $this->Paginator->paginate());
            return $this->Crud->execute();
        }
}

I realize I've asked a lot of questions, I just want to make sure what I'm doing is feasible/logical.