As you said, I can do what I want. I will do what works for me.  I still have all my toes and feet after 71 years. In fact when I was a teen cutting lawns in the neighborhood, we didn't have any malarkey safety stuff.  Just an engine, wheels, and a handle to push, right?  I like doing my own maintenance, just so the servicing "professional" can't return it to factory specs.  I like it that way.  I appreciate your concern for my safety.  In fact, next time it snows, swing by my house and do some shoveling.  That way I can save myself some back pains.