+1 for longjohn's setup. (WRT the "chines"). As per everyone else, It took a bit of tweaking!
I Sikaflex-ed a 1/2" wooden block painted in International Paints' "rescue orange" (just to blend it in!) onto the hull, and had to re- drill it three times before I got the optimal setup. I am also about to fit a "spray hood" to the wooden block as the "Belagio effect" has resulted in a spray plume that jetski drivers are envious of!
Works fine up to 30 knots. It might work above that speed, but I'll need a bigger engine to find out!