A few tweaks and the Roadster seems to be running well and not overheating - even in Florida's early summer heat!
A few quirks still... the temperature gauge changes + or - 10 degrees depending whether the headlights are on or off!! It's almost an instantaneous change. Must be some sort of short. A little concerning when I turned the lights on while stopped in traffic... only to see the apparent engine temp jump to Hot... not that the gauges are that accurate!