'Morning James, thanks for the latest pictures. Great to see the Mayhemmers responding as usual, that's what makes this forum the best
It looks like you have the basics to work on with the rigging etc, the main problem being the steering area.( Yes you seem to have all the bits in their right places
) As mentioned Gosport Club does have a good collection of vane yachts (my club) mostly 'A' boats and recently reviving the vane 36" class - that's why I said I was surprised at the £75 as I have seen the engineering masterpieces on the sterns ! These must be the self tacking units mentioned, at the other end of the scale is a system where the rudder is controlled by the movement of the mainsail boom as opposed to a balsa vane being in control. It looks like you have been supplied with drawings of units of the not quite so complicated devices, which are probably more suited. Horses for courses as they say.
I would respectfully suggest (If you haven't done so already) a trip with all the bits to the the Wickstead Club, much better to have it explained 'hands on' than trying to understand a load of well meaning advice in what is, as you say, still a foreign language. I also don't mean to appear patronizing
It will be worth it in the end
Mike