I was shown the hand-shake grip to start with, and it felt ok initially, but kept wrist-breaking a lot.
Something made me have a go with the index finger on top, and a somewhat partially splayed grip.
The issue I'm trying to understand is what parts of my hand provide the grip, and what parts provide the 'feel' of the rod ??
That's why I was thinking down the lines of having a 'fatter' handle.
Speaking of which, is there an organisation overseeing/accrediting/collecting decent rod-builders so I can locate one ?
Had a similar problem when I played cricket, only felt comfortable with a bat that had a really thick handle, but that was easily done, as you just put extra grips on the handle, which didn't make the bat look different.
casts_by_fly - how did you size/measure your dad's hand-grip ?