Traditionally gaffed rigged with dyneema standing rigging

[Brion Toss]

Hello,
We have rigged numerous boats with Spectra/Dyneema, both traditional and modern. It can be readily served; we parcel with friction tape, both to provide a slightly adhesive bedding for the service, and to provide one more sunlight barrier. Of course, the service isn't needed to prevent corrosion of other types.
We mostly use HSR, but Vectran is excellent, if you can keep the sun off. Braided covers are also available, though hard to find in this country at the moment.
Re the schooner, you are very, very liable to creep issues, as preventing those requires that you have a lower relative working load than with wire. So I am hoping that the wire was way stronger than it needed to be...
And yes, The new Apprentice] has a lot of information about HM rigging.
Fair leads,
Brion Toss