I can't figure out exactly what you are saying. Seems like a lot of complaining more than anything. I hand prop a 100cc Brison 5.8. I have never even had my hand slapped because I know how to do it. If people get their hands chopped left and right, the rules about props would change. Since it doesn't happen, there are no rules reguarding how you start your plane. How would this really compare to anything. What do you think I said about 3d? What makes you think I am advocating more rules? I really don't understand what your saying or what your logic is. Just a lot of mindless complaining.