Thanks for that, that’s all useful - with the 8Gb Pi, are you running 32 or 64-bit OS? I think the problem is that if you run the 32-bit OS, it might not use the full 8Gb of RAM. So you may not get any advantage over a 4Gb model. However, it is nice to know that it works!
There’s documentation about the internals of the server, the HTTP API, and how to write plugins. However, there’s not really much of a user manual! We should really sort that out… Currently, stitching isn’t done by the OpenFlexure software, but I think folk in the forum have described how they have stitched images with ImageJ. Maybe start a thread about that if you can’t find more info, and mention @dgrosen because he’s made some stunning stitched images!
“store raw data” means that the JPEG image also embeds the raw data - though you currently need to use a different tool to extract it; the gallery only shows the processed JPEG image, even if raw data is present.
Auto gain and shutter speed should work either with or without a sample - and should be fine to re-run whenever the image looks too bright or too dark.
The “set path” button just allows you to choose from locations in the menu above; it’s really only there to allow you to switch between the Raspberry Pi’s SD card, and external USB storage (if you plug in a USB stick, the autostorage extension should make it easy for you to save images there, instead of the SD card). We should definitely make this clearer when we write a software manual…