I have had mine on my Marlin for about 5 months now and could not be happier. I don't know why they put 3 blades on to begin with after seeing the difference. Search my post and you will find my write up. Get in touch with Ken from Prop gods 941 733 5808. Even if you don't buy from him he will go over everything you need to know.
Nick
I think Boat Hound has a pair of Rev 4's on his 265. I never saw that he posted any numbers with them. I had Ken send me a set of 17's but unfortunately they were both RH when I opened them up. There is a LOT of blade area on them and I wonder if you'd be over propped.