Hey kopstamp.
I hooked into some Yellows at Transkei in Dec 2007 ,couldnt land one I got cut of on rocks.
I used white PREDATOR plugs.
I used a medium retrieve very early in the morning at day break, just breaking the water surface with the plug it worked on that day.
If you PM me I will send you the contact deatail of Doug who makes the Predator plugs