Yes Mom, (I mean Dick)
Believe me I thought twice about mentioning that, but it is what it is. Not safe, not smart, but at the time I was just trying to figure out how to best drill the prop when it hit me..the first hole was a piece o cake...then this idea of the bolt came to mind how to best locate and hold the jig steady...then another and so on.
I am not recommending to do it my way, but it worked out just fine all the same.