Brilliant write up.
Very good read.
The art of correct propellers is a black art as well, Depends whom you speak to. Also need to take into account of the boat it is running on,
For example my engineer used to set up my twin engine installation on the Hunton the same as he did for single engine V24 race boat,
Talking to another Hunton Owner whom has done extensive prop testing he has found that the boats perform better with a slightly different prop set up.
I remember when I sent my props to Steel developments for some minor dings to be taken out they "on their own accord" changed the cupping, Before work 47 knots top speed after work 43-44 knots, I was not happy,
And to top it all the 4 propellers did not even have the blades set the same