RE: Can a propeller be redrilled???
repairing is a different story. re-drilling them to make them fit a new bolt pattern isn't a repair. If your talking repairing a crack or something like that, it would be ludicris. That would be a dangerous prop.
Many props have multiple hole lugs though. As long as the holes are clean and straight, they are no weaker than a single hole unless you use huge holes and leave no material left.