I was thinking he just wanted the cool factor and for it to be a bit more than just a 46 with a 2 blade. I know what you mean though. I have a 3 on my hangar 9 mustang (60 size) with the 120 pump. It spins a 15X7 3 blade, but I still get about 130 140 out of it. I'm sure I'd increase speed dramatically with a 2 blade. But it will pull straight up forever with the 3, besides 3 looks better........ Can't wait to get the 14X7 4 made for it........[8D]