I found my Sterba prop was rubbing slightly against my cowling, since I 
wanted to touch up the scratches from that I removed the prop (have a 5" 
extension) and I placed a 2ΒΌ dia washer about  1/8" thick inside the prop 
bored hole, exact fit. This should allow me to project the prop out just 
enough to clear the cowling.  my question is, do you think with the washer 
should play no danger?

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