Custom Post Type and Sidebar Location
What is the correct way to add a custom post type and be able to set the sidebar position? Is there a plugin you recommend?
Nick had a similar ticket awhile back and documented his process here, though it's unlikely a copy/paste solution. It all depends on your post type and the way it is registered to the theme.
If you're using the latest version of Synapse there are multiple methods to override the defaults or to declare your own. I've attached a zip file that shows a few ways you could override the column widths, sidebar location, custom widget location, etc.
That said, Custom Post types are a pretty advanced beast. I've found Advanced Custom fields to be a really versatile alternative to modifying the UI based on core conditionals. I used it in Mobius if you want to look at an example.
If you want to elaborate a little more on what you're trying to accomplish, maybe I could offer more specific help.
As for what I am trying to do...
I want to be able to segregate between two different post types in the WP admin area for two reasons. Once so the client understand where to post blog entries versus their news items. And also to make it easier to do searches and other things just to one post type.
If I understand you last post, what I need to so is copy single.php from the synapse folder to my child theme, edit the name to be single-(new-post name).php and then it will have the correct option dialog for the sidebar. Did I understand that correctly?