Questions about mounting a composite prop spinner

I have a Sensenich prop spinner that I'm modifying to use between a gear reduction unit and an IVO prop hub. I was initially advised to get a UHS spinner but it appears that they are out of business.

1. Can the spinner backplate bulkhead be mounted between the metal gear reduction and prop hubs and be torqued down without damaging the composite?  I've never worked with this material before.

2.  The predrilled holes in the bulkhead are around 5/8", way bigger than the AN6 bolts in the hub.  Are there bushings that I need in order to reduce the hole size and perfectly center on the hub?  Even if this spinner bulkhead were mounted with a Sensenich prop, it looks like bushings or something else would be necessary.  

Thanks,

Brad Kunkel

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