you might be able to drill a couple of 3/32" holes in the spinner backplate and press fit in 2 small pieces of music wire sharpened on the protruding end....when you tighten the wood prop, the pins will press into the wood (or you cold drill holes for the pins in the back of the prop using the backplate as a template), provided you drill them close enough to the crank bolt that the thrust washer will hold the pins in and prevent them from being pushed out the back.....make any sense? (of course this will only work on wood and not CF props)