Ya ajjza I think I know what your talking about the Allen is a crazy size. I've got several Allen wrenches but the one that fit the best was one I got from a wheel collar set. That secures my wheels.the spinner is on my 45 flying fool. Four at an angle to secure the prop.spinner. two would not line up until I tried a different hole in the back.plate. seems the four Allen's are matched to a one of four holes in the back.plate. been working on my cover for my 580 fuel tank on my Super Ringmaster. Trying to get it ready for the October Brotherhood Ringmaster cfun fly. Glad to hear from ya. Seems like I was posting. Seen guys were reading it but not responding. Keep.them lines straight and tightAJ.
one other thing lI also had to rotate the spinner mine will only go on the back plate one way. Scribe on the spinner and back plate. So it will.line up. Securing the prop.nut was not a problem and it really fits well. Thought about using locktite on the threads but felt I would strip out the threads. Just better to check them after every flight. I do that anyway, especially the engine 4 mount screws. Learned that deal with experience.