Hey Elliott,
Thanks for the code, this did resolve my issue (i.e. I know I have a lot of header links and I just wanted the mobile device menu to appear for ALL mobile devices).
Here is the code I put into the Quick CSS

@media only screen and (max-width: 1200px) {
nav.main_menu { display: none !important; }
#advanced_menu_toggle { display: block !important; }
}

If you go to http://abenvirowaste.com/dev/ on an iPad you will notice that the mobile menu icon is now there…but it doesn’t work. I also tried it on my desktop computer (just shrunk the browser window), the mobile menu icon appear, but if you click on it nothing happens.

The strange thing is that if you continue to shrink the screen size (like down to a smaller size) the mobile menu icon works if you click on it.

Any thoughts?