David:
I forgot another very important issue. Spinners.... They do fly off at rapid speed, and usually straight forward. A buddy of mine, started his Saito 82, next thing I knew the spinner was flying by me and hit the ground about 30 feet behind me. I was in front of the plane, and that is another mistake. Never stand beside or in front of a plane that is being started. Always stand behind it.If it's your plane, of course you have to be in front of it, but helpers and others should be away from harms way.
I am not an expert by no means at all, just a very fast learner.