I know you said electric but do not base that on what you see running cars and trucks...aircraft glow is a different world....glow plugs last forever compaired to cars, engines run cooler as aircraft are faster and are away from the heat of the ground. once tuned you hardly have to mess with the mixtures.
I started RC trucks glow and was shocked at the differences between aircraft and trucks...besides with glow all you have to do is refuel and off you go again no time waiting for batteries to cool and charge
Just a thought