That wasn't the scope of your first post. You were concerned about wood props.

The hole (Axis) position thing is applicable to any rotating disk, wood, steel or composite. It can be dealt with by moving the hole and subsequent bushing the bore back to size. Another just as viable method is balancing the disk. You would still need to do this even if moving the bore.
The drilled holes in the APC composite prop are notorious for being out of position. See earlier photo. That Top Flight wood pylon prop has a heavy hub 90° to the blade axis. Is this from a miss positioned hole or a variation in the woods density? The engine's crankshaft wouldn't know.

If the back side surface favors one blade more than the other a pitch gage like what I have shown will show this by bringing to light that one blade has more pitch than the other and/or that one tip is above the table higher than the other. As most prop bores have a clearance of about 0.10 mm the squareness of the bore to the prop clamping surfaces can be off a bit as the hubs aren't very thick. Yes, the squarer the better but the primary surfaces to datum the props pitch and tip tracking are the hub faces.

The main point of my post is to treat the prop as a disk and not a beam when balancing them.

All the best,
Konrad