Sail boat
I use one servo for both main and jib sails on my yachts. I tried using a separate servo on my Cariad but in effect it sailed just as well with the jib allowed to set itself freely on a cross slide on the front deck. I found it difficult to effectively operate the jib servo especially at any distance as the wind can change so quickly.
You could use a Y lead which would make life easier.
Best not to have a spring on the control stick as you really need the stick to remain where placed.
Good luck with the setup and I hope you enjoy sailing at Black Park and receiving all the help you require
Dave
Dave