Hi. I purchased a .82 Saito engine and I attempted to attached a Tru-Turn spinner. The hobby shop rep sold me the adaptor set along with the spinner.

I attached the adaptor according to the directions (although I was little unsure), but when I installed the cone retaining screw the cone didn't lock down. I was still able to swivel the cone. The cone should be stationary, correct?

Could I have the wrong adaptor set?