I've been playing around with motor height/trim and believe I've done just about everything I can to maximize the efficiency of the setup without adding/replacing components. My aluminum prop has seen better days, it's not horrible but there are nicks and scrapes all over the leading edge on all three blades. I currently don't have a spare and am considering re-propping to try to eek a bit more performance out of the setup and have a backup on hand. Here are the specs on the boat (yes it's underpowered but the whole rig was dirt-cheap and it fits the needs for the time being!): Tracker Grizzly 1648 w/ '15 Yamaha F25 (No PTT) - Tested rigged for normal use (approx total weight 1150 lbs) with weight distributed evenly. GPS Speed 25.8 MPH, RPM 6180, Factory Yamaha Aluminum Prop 9 7/8 x 10.5 (13% slip) The motor is mounted on the transom and is approximately 1/2" above the keel when level, but my running trim setting puts it closer to dead even with the bottom of the hull. The AV plate runs just under the surface at WOT but the wake is not as clean as I think it could be. I'm considering going with a PowerTech SRA3, undecided on pitch at the moment. 10x10 would probably be a safe bet but I might be able to get away with a 10x11 given that I'm currently on the high side of the RPM range for the motor. I'm trying to decide whether or not it'd be worth considering a setback plate as well to get the prop back in cleaner water (and gain a bit more running height). The boat has a bench seat so I'd likely keep the setback between 3-4", I don't really want to sink the money into a PTT unit because I don't plan on keeping the boat for more than a few years. I'm ready to pull the trigger on a prop, waiting on some return calls from the local guys/PowerTech; in the meantime I'd be interested to hear yall's thoughts on the matter as well!