Steering system for twin electric outboards on solar powered catamaran

[altruistica]

Hi,
I am completing a 40ft solar powered catamaran. The electric ouboard motors have just reached the import distributor and I have yet to pick them up. The company is a specialist in hydraulic steering systems on large boats and trains. The original builder of the catamaran built it with the view of using two 60HP petrol powered outboards controlled by hydraulic steering. He has already bought several lengths of very expensive hydraulic pipe and some manifolds, but nothing to connect to the motors themselves. The distributor suggested I bring in what I have when I collect the motors and see what could be fashioned. I hope to do this some time this week. In a conversation with my brother-in-law, he suggested I might look into controlling the motors via wireless servos. He is a model car enthusiast and suggested something similar to what is on those might exist for outboard motors? Is this the kind of thing EPropulsion are using on their new X12, X20, and X40 range of electric outboards?
I have bought Aquamot Trend 15.0 outboard motors as they run at 48V (unlike the EPropulsion 96V range) and will slot in easier with my LiPO4 battery banks and solar inverters.
Anybody got any experience with steering on cats, hydraulic, servo or otherwise?