Without actually using it, it's hard to say just how easy it is to use.
As someone with a heart condition, I find those pull cords sheer hell, and if they don't fire up first time I've had it. It looks as if it would be very useful for starting a Mantis, which is something I can then use. However, a chain saw, big strimmer, or even a mower (big ones run away from me so I have a push-start mini tractor which starts with a lovely ignition switch
) would be too big for me to use anyway. But for someone who hasn't lost their basic strength, but just can't pull the darned cords, your invention looks superb Frank