I'm hoping someone knows the answer to this question. When I bought my boat last year it came with an upgraded prop. I never thought twice to check the numbers on it. However, since I have upgraded the ballast the boat seems sluggish. I checked today and I have a 537 installed. Wakemakers say this is for an Outback V and used for recreational purposes. What do you guys think, it doesn't sound like an upgrade to me?