Mounted the spinner backplate assembly to the engine in preparation for fitting the cowl. The old spinner hub I'm using came with three previously used mounting bolts. All three bolts had thread damage and the roll pins were sheared off. I cleaned up the threads with a die which worked well. I also drilled out the old roll pins. After installing the bolts into the prop hub I installed new roll pins. The assembly mounted to the engine with no issues. That will be it for the spinner for a bit.