Well guys I'm new to the jet boating world. I just bought an 86 21ft Kachina with a 460 and a believe it has a Berkeley pump with a jetvator. My question is that my boats rooster tail is about 6 feet tall and was wondering how I can get a bigger rooster tail. I've heard that putting a wedge in will do this for me but can somebody give me some advise on that. How big should I go and what would I need to buy....thanks in advance for the help.