Moving sidebars left/right without changing source code ordering

Montezuma documentation is presently a little sketchy on source ordering how-to's. Users who want SEO benefits of content loading before any sidebars, but prefer sidebars on the left side have little info to go on.

But having spent an hour or so figuring this out (and having just tested it with good results), I think I'm on a good track, so I figured I'd share this for anyone new to this topic. If anyone on this forum who has some experience with source ordering can chime in and add anything I may have missed, please do so and I'll include that in this post for anyone looking for this info.

The Math
Let's say you have a default layout that has a content area on the left and a sidebar on the right. And let's also say, for the argument sake, that you changed your content area to take up 9 columns, and your sidebar to 3 (for a total of 12):

That means that you have to push the 9-collumn-wide content area by 3 columns, and pull the 3-column-wide sidebar by 9 columns.

In short, content = push3 and sidebar=pull9 (notice you're specifying the amount of pushing and pulling, as opposed to specifying the width of an element)

The code
In Montezuma Options > Main Templates locate the template you wish to modify (or create a copy and assign it to a testing page before you commit) and hunt down the opening <div> tags for each of these two elements. They will look something like this:
All you have to do is add push3 class to the first one and pull9 to the second so they look like this:
The resulting page will look like this:

But most importantly, as far as search engines are concerned, the content will continue to load before the sidebar.