Oh no not again!!!!
But these ARE totally different!!!
Volvo QL trimtabs
They have been mentioned before but not in much detail - anyone knoe anything about them???
They are more like spoilers or blades that move down vertically - supposed to be very reliable and foolproof - have fancy controls and could even be used for steering!!!
Looks like they will add quite a bit of drag but then again so do all tabs - only drawback seems to be you are'nt actually increasing the effective hull length of your boat as you would with normal tabs.