scraping prop

[oxo]

On trying to fit a bravo four blade prop to my cle box, I'm finding that the back of the prop is hitting on the retainer. Anyone know of a quick fix? Adding another washer etc?

[Hydrostream]

Use a thicker thrust washer or could put two in for a quick fix!

[oxo]

Thanks,
Had been giving it some thought, but better to err on the side of caution.
Always better to get some other points of view( or horror stories!)