Prop walk with a Max Prop
Prop walk has as much to do with tip clearance from the prop to the hull, and the hull configuration (shape of aperture, skeg. etc.) where the prop wash impinges.
So if you want to reduce prop walk, consider to reduce the diameter of the prop and change the pitch. If you can master ''backing and filling'' when going astern .... you''ll eventually actually desire MORE propwalk.