RE: Midrange issue - glow plug?
I humbly appreciate your words, Daggets.
For an engine with a particularly high compression ratio, such as a Rossi, or an MVVS; using a hot glow-plug and higher nitro fuel, are both out of the question, to improve mid-range reliability.
For an engine with a more 'general purpose' C/R, either can be used for this purpose.
But still, this is not the best solution.