So with the updated BC page some of these moved slightly around:

Pneuma is now here:
https://feinstruktur.bandcamp.com/track/sonogram-v-pneuma
as part of the sonogram series

And Æquinoctium is now here:
https://feinstruktur.bandcamp.com/track/quinoctium-2
as part of the Sortilèges & Enchantments series