Thanks for your advice and help on this one Symphony, we are based in Fethiye , Turkey , but are UK citizens, you are correct in your advice on getting a professional to fit the Tunnel , this was our assumption also , as I am an Electrical Engr the motor and associated equipment was to be taken on by myself , but as you say the forward water tank may be an issue and this is something we certainly do not want to loose although the Tunnel Thruster Type is our first Preference . Will check out the website you suggested , thanks .