I made the metal prop hub using a resized photo of the one on the Bentley BR2 glued to 2mm aluminum sheet. I center-punched the holes then drilled them out, then sanded the piece to the outline of the circle. After cleaning this up, I centered the hub on the prop and used it as a guide to drill one of the holes along the edge. I then screwed in the bolt to hold it in place and then drilled the hole on the opposite side and screwed in a bolt. Once the position was locked in I drilled all the other holes and when I had all the bolts in I used the hub as a guide to enlarge the center hole to the size of the Saito drive shaft.

The last photo is another shot taken today in the local hills.