I prefer electrics, but the nitros I have owned I kept or installed a pull starter. I don't like having to carry a bump box/batts or a battery powered roto start. part of the joy in nitro is not having to worry about batteries dying.
also, I don't like to have to carry the extra gear with me....just a glow plug and fuel to re-start the rig when it dies. A well tuned motor will fire up plenty quick with just a pull start. on the flip side.....when the motor is having problems a pull starter can get frustrating pretty quickly.
to krazy matt....a glow plug can glow but not do so once in the motor and under compression. try a new plug 1st. try many things before messing with your needles. when a motor runs and then doesn't, it is more likely not a carb issue (unless the carb got clogged somehow) and messing with the needles will just cause more problems. Flooding a motor can often cause a glow plug to fail, even if it isn't very old.