Fix in Bones you went with the interceptors. I think that is what they call the ones with the strips or inserts you can change to effectively alter pitch. I bought Veem for my boat a couple of years ago when the interceptors were somewhat new. I decided against them, only because they were new. Are you planning on having to change the strips to get your WOT rpms right? I would be interested in how these work out for you. They would have saved me some money as i had to go thru 3 changes to get my rpms to were i wanted them (50 over rated in the summer with some shark skin on them).