Re: How does the killswitch work?
On a points style ignition the kill switch or button method of grounding the signal to chassis ground was and still is perfectly acceptable.
Quite a few of the more robust modern electronic ignitions can also withstand this method.
I would not venture so far as to call the ignitions used in these HT engines robust, more like barely adequate and cheaply made.
Do as you wish, but consider the quality of what you are working with and how most electronics respond to being repeatedly shorted out.
"It's a chinagirl. It's a sometimes fun little engine that often will break your heart. It's disposable.
Does not come with a fortune cookie."