Main relay just replaced. Seems to stall now when slowing down. Green Key light comes on. When attempting to re-start, it turns over, does not seem to catch, and dies out. After 3 to 6 attempts, it will start. When stalls, all electrical goes off.

Replace the Ignition Control Module and coil:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-4.html#post265896

Call Honda at 1-800-999-1009 and give them your VIN to see if your car is covered by the ignition switch recall from 2002. I have been having the same issues for months and my excellent mechanic couldn't replicate it. I just learned today that my car is covered and the dealership will be replacing the switch this weekend.