Internal URL or menu callback to use node/entity content without html/page wrapping Does anyone know, if there is any work-around or regular setup for panels or custom code known, to be able to use a url/node/%id or node menu-callback to render node/entity content delivered without the rendered page wrapping (&lt;html&gt; &lt;header&gt;,etc)?

I am not asking for Panels_everywhere behavior nor for Drupal modules like Colorbox, Lightbox, and all the others, nor Colorbox_node popup and such. I only try to have the node/entity callback url at hand to render entity or node content without any page.tpl.php or html.tpl.php involved, to use it somewhere else like for bootstrap modal, node_panels rendered into modals, or for custom scenarios to get most flexibility. 

I took a look into Ctools module suite's modal callback and Entity_popup but the lack of documentation (no offense) and the confusion in my mind lead me to here asking for some breadcrumbs and ideas.

Thanks for any help on this.
After some research I maybe found an answer by myself for this question, not sure yet. Maybe temporary or at first glance only. 

While I embrace user5482's (Thanks for your fast reply!) approach using hook_menu() in a custom module, what I have considered already, I still have 2 worries. First: there is missing experience on my side and missing documentation on the functions side for its underrated delivery argument (take a look here). Second: Custom modules should only be considered for very rare individual situations, otherwise you fastly run into 10 custom modules on a project which need to be maintained on core updates. If the scenario what you are looking for is more common, the chance is 99%, that there is a module for that.

So, at first, I will try to achieve this with the JQuery_Ajax_Load module, which actually builds on the mentioned hook_menu() and I will report back when I have any news on this.