I didn't have a clue it was Enya that developed the twin needle carb. I also haven't seen anyone pull out any idle bar plugs in a long time. I still have a pile of them from days of old. I do know guys that have started to try the plugs that they use in there cars. So far I haven't heard any talk about them in the bull pin.
I'm stuck in a rut, these days I pretty much only use the OS 8 and type F plugs in my engines. I think the smallest engine I have on hand are a few .25s but I haven't used them in years.