Well, I've swatched Van Dieman's Launceston Fog and Sacagawea this weekend, and was able to photograph Launceston Fog in not just natural light, but actual sunshine. I didn't manage to finish Sacagawea before it got dark, so I'll just hope there's some sun next weekend, or at least only light cloud.
Sacagawea is stunning when I manage to get it to work, but it does not like the Hocoro dip pens and I keep getting airlocks in the channel in the feed of the WS3008. The shimmer settles so fast you really have to have your wits about you when filling. I may try to find a broader nib for one of the Wancais, and possibly have two so that I can swap a nib unit out to give it a good scrub without having to empty the pen.