Hi Dan, if you haven't already checked it out you could read "FAS it works!", as much work has been done already. It is a long and sometimes confusing read.

To sumarize, The simple way to force auto stop is to do auto stall. Mike has published a schematic for a relay latched version on his site that has been verified to work. I have tested a solid state version on the bench but not yet in my car. Soon!
I assume you are considering using a linear version of Mima?
If you PM me I my be able to send a Jpeg of an appropriate section as the full schematic is YUUUUUGE.