The idea of a double-tracked / electrified West Clare, and/or unified double-tracked CDR/L&LSR system, would have been intriguing.
Full front-line service for the 800s should also have seen them able to work to Westport, Achill, Sligo, Limerick.....
A double-tracked Achill Line - now there's a thing.
The combination of these fuels, and the resultant exhaust emissions, also led to experiments with afters-burners.