RE: Prop slipping on spinner?
I agree with Carrellh. I've ran plastic spinners on 4 strokes with no problems at all. I have a plastic Dubro spinner on my Hog Bip with an OS 91 on it. When I reviewed the World Models Super Chipmunk I used the stock plastic spinner that came with the plane on a Saito 100 and didn't have any issues at all with it.
Ken