Need a prop & spinner for a BME 100.

The engine was previously run (just purchased used) on a 26/10.

I assume I would run a similar prop on my older (just rebuilt it - from a different modeler from the above listed one) Carden 35% Extra (should weigh 26 - 27 Lbs when done).

There is some used stuff I have seen that is drilled for 3W/DA- would I be able to use one of these by enlarging the single hole to ~7/16 or will there be too much weakening already?

What alternative size/pitch props would be acceptable?

Let me know your thoughts and what you might have available to sell (or Trade)

Thanks
Eric