Just got the jack plate on the Classic and may need a little more grip to get in the skinny water. I have been reading that 4 blade is the way to go. I am currently running the stock 3 blade 9 7/8" * 11 1/4 prop on my Yamaha 25 2stoke. My RPMs (no tach though) sound too high WOT. What size would you guys start with for the 4 blade? Anything else I should know before purchasing one? Thanks very much in advance!