My husband deals with antique instruments - modern makers use a plastic, delrin, for quilling jacks, but it really doesn't make as nice a sound as real feather, and in addition it damages the slots made for quills in jacks, because the slots usually are slightly curved to take a feather, and delrin quills are flat. The collection at St Cecilias is the biggest harpsichord and early keyboard collection in the UK now, and a substantial proportion of the instruments is in playing order, so it is a priceless resource and well worth the effort of using historically correct materials.
And if anyone has a pet raven, any moulted feathers from that would be sooooo fantastic to have
