I know that a good many risk their hand and fingers hand starting hi powered nitro and gas engines.they are perfectly content and that's their business.this past summer after 3 decades of rc I endured a bloody prop strike that opened up a deep cut.yes it was my fault and I am humane.i do have and use a donation starter.if you have any doubts about your abilities or confidence don't do it by hand.the consequences are not worth it.