try a reamer on a composite prop ha,,, well at least i know that Master makes one rock solid prop ...Blast two days and i'm still reaming I know its sharp cuts wood like butter apc props are a little slower but the master is by far the hardest material to get through... (well i wan not making head way so i pulled out the drill and ruined the prop...what a waste you just cant to it with a drill)gerrrrrrr