About time someone invented a bolt-on starting system that starts the engine on a fixed after-TDC timing and has a short run time before it ceases to provide sparks. Surely that could be designed to bolt between the mag body and the cap where the ignition wire slot in? Easy start, no kick-back and will not run away if you leave full throttle on.
Leburg has an easy start feature but no cut-off unless you knock the fuel tap off before you swing it.
(Posted this before but usually interests someone)
PS Tailskid bolted to the concrete. First day out of my plastercasts after broken thumbs.