I have an ONNO carbon fiber kick up rudder on my v12. I am familiar with the van dusen and the one that epic sells. I am not fully satisfied with my setup. The rudder is beautiful and well made, but the kick up is just not ideal on that boat. For one, there is very little steering ability. My weekly race is mostly canoes (the north american variety), and in a pack at the start the make some turbulent water. The v12 gets spun off their wake with a kick up. By comparison, my K1 with a kick up of similar size has plenty of control. Also, it's difficult the get a smooth feeling connection between the original steering lines and the kick up. If you want a set up that is easy to switch back to understern, then you want to leave the metal clamp attached the original lines. This clamp knocks and catches when the kick up lines are also attached. What some people around here do is put a shaft down the rudder tube, clamp the original clamp to this, then another clamp several inches higher to go out to the kick up. This is not that easy. Unless the clamps are superman tight, they will spin on the bare post and then you've lost your steering. Where i live the main reason for a kick up is not rocks or logs, but dense matts of weeds. For this, the epic weedless rudder actually does a fine job. The advantage is that steering is 10 times as responsive with the weedless understern. And its only $80 US.
Current Skis: Nelo Vanquish AIR, Epic V10g4, NK 670 double, NK exrcize, Carbonology Feather, Think Jet, Knysna Sonic X
Former Skis: Epic v10g3, Kai Waa Vega, Epic V12 g2, Epic V12 g1, Epic v10 double, Nelo 550 g2, Fenn Elite S, Custom Kayaks Synergy