RE: Sail quiver: One or more manufacturers?
The nast issue is indeed important, but there are in fact many brands that can share masts (far fom all though). I would say keeping the character of the sail is more important and I would also say it is more likely that you learn to tune your sails perfectly if you stay within one brand (or even one model when applicable).
That said, in practice a range from wave to freerace can sometimes be though of as two completely differnt ranges so you might not even need to share masts between the two. or example you can have a wave/crossover range up to 6.0 setting on masts up to 430 and than go on with a freerace range from 7.0/7.5 setting on 460 and above masts.