Richard L,
I would rather run a slightly smaller than scale 4 blade prop on my Mustang than an ugly not scale at all 2 blade prop. I am using 3 blade props on my Ziroli B-25J, because I have put too much scale effort into her to shame her with 2 blade props.

Kilroy52,
Keep the 4 blade info coming if you try anything else.

"Keep 'Em Flying!"
Flak