One thing I did to keep the splinters from happening on the exit hole while drilling: Drill almost all the way through the prop but stop when you start to see the bit popping through. Turn the prop over and just open up the hole from the other side. Makes it much cleaner, no splinters.

I like the tips I read here. I never thought of bolting the drill jig to the prop, even though it seems kind of obvious now.....

What I did was put a bolt through each hole after I drilled it to hold the jig in place on the prop. Also I used the biggest drill bit that will go into the drill jig. That way I have a little forgiveness so the bolts thread into the prop hub without side binding. If the don't you can always open the holes just a little with the same drill bit. Works great.