Nice, I like the kevlar shield hose idea. I agree a hot gas leak plume may be quite destructive.
The silicon wire puzzles me since all types of silicon I have used have a very poor resistance to kerosene, sort of goes snotty and swells up getting very soft?
Have never tried the servo silicon, no experience there.
Just built an e32 plane with silicon wires on the ESC and it exposed wire just about right away after getting nicked on a sharp edge. This was on an e-flight ESC.
Ptfe wire seems like a good idea but rather inflexible if I remember correctly.
Some readily available high temp servo wire with kero resistance could be a good seller....
BRG
Andre