Curious question. I see that now there are 4 radio functions allowed. I recall many years ago only 3 functions were permitted and the choices were 1 rudder 2 main and jib sheet 3 was the option 1 jib trim 2 jib twitcher or the backstay.
I see that the backstay is no longer an option. Is my memory good?
When and why did this change?
Thanks