Request control of user/visitor ratings per post type

You mean you want to make it in a way that you can enable vote for members only for one post type and both guests and members for some other?

The short answer to your question is “yes”.

If I had my real wish, the tables would contain a rating for both types of interaction. But there is also the possibility that a visitor rating can be distinguished from a member rating by observing the actual data in spr_votes.user_id.

Display of a post of whatever type could optionally show two ratings on each post side by side: The member rating, and the visitor (facebook, oe whatever) rating (if applicable). But I know not how to “compartmentalize” the current javascript so I can load it twice per post and have it work. That, for me, is a pretty tall order. For the present I am hoping for an upgrade to “simple Rating” that would allow the selection of whether rating for members only, or for everyone, to be a per post type decision.

The Simple Rating plugin is active at Assembly Tacoma with no alterations of any kind. But I have created a “ballots” plugin to manipulate the spr_votes and spr_rating tables as is demonstrated under the “Articles” menu item. Folks can log in as “demo” with password “demo” to see how this plugin allows members to change their rating or remove it. The plugin also allows folks to see the actual ballot box. I am considering getting rid of my plugin, adopting yours, and extending it, I just do not have time to learn javascript.

Okay, I pretty much understand what you want.
Though, I don’t see this functionality as commonly needed. Therefore, I’m not going to spend time on this, at least for now.
If you really need it, either develop it yourself or hire someone to do it for you.