I have updated all of my assemblies with the new servo model I created, and it works really well. 
I gave it the hard test and loaded up my Scout Quadraped model and let it update and saved it, then reloaded it.
Then I selected the Make Flexible option when I right click on one of the leg assemblies. After doing that I tried to rotate one part of that leg, and it worked! I was able to move two of the joints independent of all the others and the other legs. 
I can now theoretically pose a subassembly in any pose I want independet of any other subassemblies of the same kind (like two left legs, etc).
I can get at least a two hole alignment on all of the SES brackets I already have assemblies with, except, except the servo side mount bracket (asb-14), which has strange servo mounting holes. I can’t get any alignment to the asb-14 at all. At least two alignments and a mate are required for a part to stay where it is supposed to be. This is especially important for any assembly that has parts that can move.
I have not tested all of the brackets with the new servo yet, but am working on that. I already have subassemblies that use most of the brackets, so now I just have to test the rest of the brackets.
The servo-top-cover in the servo model I am using is slightly different from the one I sent in the zip file to Beth. Let me know if that one does not work right and I will send Beth the update. My model mates perfectly to all four holes of the asb-04 multi-purpose bracket.
8-Dale