Do the skegs make the ski more stable or would they increase the lift making it porpoise more?

I ask because I hate the way the RXP porpoises, i was hoping the riva grate would take care of that, but it is just not aggressive enough. I have a set of RIVA pro blockoffs on the way so that should help. But what about the skegs? I dont want this thing to porpoise any more than it already does.

and a side question, how do people race these hulls? these things just jump out of the water at every chance. makes me miss riding my old xpl ( it just slices through the chop)