Of topic, but further to the plug conversation.
Over the years I've settled on two plugs: Enya nr 3 (my normal two stroke plug) and the OS F type (my 4 stoke plug of choice).
Having said that, I've been using the F in inverted two strokes for years. Everything from the .46FX to the 1.40RX. I was something I picked up from the F3A scene. Works GREAT. Especially if you have a two that runs rich in the mid range which is normal when using a pump.
Nitro wise I use 30% heli in the YS 4 strokes but only 15% in the OS four strokes.
Two stroke wise, I've tried many combos but found that OS prefer 10-15%. If one goes 15% I'd recommend one extra head shim. Not necessary for 10% running but but really smooths out the two strokes on 15%.
Regarding the scary long F in a two banger... there are many long reach plugs out there for two strokes so nothing to be scared about.
Try one Pete, the engine won't explode.