In general this is really a bad idea. When you start cutting down props you run the risk of actually damaging the integrity of the prop itself. Plus, APC props are designed and shaped from the hub to the tip of the prop, and when you start cutting or removing material you change the shape of the prop. This will more than likely make the prop less effective. APC props aren't that expensive and IMHO it's just easier to buy a new prop than spending hours messing with an existing prop that may not even work correctly, or worse yet come apart in use.

Ken