Hello Jonathon
I don`t recognise the model
That`s probably why you have not had a reply?
Just a few questions…….
I note it has vane steering and also note that the Vane is missing which would control the rudder
The Vane is fixed to the rudder and is normally set by the user to set a course across the pond
You need a pond where you have complete access to your model as it arrives at the pond edge
I think the Vane has some attachment to the sail setting too
You really need to make contact with a keen yachter, who will provide the nitty gritty info.
Look through the earlier postings and seek out anybody with a similar interest
Best of luck
Bob