you are right the oil content is a 50:1 ratio; The adapter for the plug was made out of a spark plug to which al the ceramic and electrode was removed then it was tapped with a glow plug tap(1/4, 32) and the plug just comes flush with the bottom of the adapter; the plug we used at the moment was a hobby people's thunderbolt # 3 plug which has a heavier coil, maybe a std rc plug will work better?.
As far as the the onbord system goes we found out that the engine would stop running at idle if the battery was removed.
I was also thinking Hiher comprension ratio perhaps, Higher octane fuel aviation fuel or racing fuel? and use of amsoil for a 100:1 ratio mix.