Fingers and electric propellers usually have one outcome, "Props" 1..."Fingers" 0. My recently acquired Four Star 20EP has the battery right up at the front. I didn't feel comfortable plugging in the battery and having the model become live before the hatch could be closed etc. When Jon took the model for its first flight, I couldn't help noticing that he winced a bit while I was connecting the battery. What I've done may be an overkill, but I'm getting a bit forgetful around things in the workshop, so this is my "easy to see what's happening "safety plug.