I'm definitely interested! I'll message youI've got a 12/15 Ron Braaksma 3-blade in a 1" shaft. It's steel so it's pretty rough. Steel + Lake Arrowhead = not pretty.
I ran it on a 500hp deal without any issues. I've upgraded to 1-1/8 and have no use for it. I'd get it checked out by your favorite prop guy to see what they say if you've got a big HP deal.
Aloha