Many thanks for the interesting replies to my first posting.
I’ve spent most of my life sailing catamarans, most recently racing F18’s which do not have the option to alter sail sizes and where mast rake /spreader settings / rig tension etc are all crucially important, so I definitely appreciate other approaches to the question. I had completely overlooked the relationship between main and jib and it is quite possible the boats I sailed did have a jib, but it was all a few years back.
This has definitely given me some good ideas to try out and I will continue in my quest to be sailing a wayfarer this summer.