I have very good luck with the drill guide in a drill press. Note that you drill from the back side of the prop in order for the best alignment with the threaded holes in the hub. Any 'wandering' of the drill still allows for the bolts to engage the hub accurately. I used to fuss and drill three of the holes 3/4 of the way through and the final hole all the way through to use as a pilot for the other side to minimize breakout. Really has not been necesary. The important thing is drilling from the back side.

Stan