Just an FYI, the multi and drum TOML configs can reference either the current folder, or absolute file paths from the Tonverk SD card.
So to support a sample pool, you’d need to write the file path as something like sample = '/mnt/sdcard/User/Single Samples/Path/To/Sample/filename.wav'
I tested this with some presets and it works, using relative paths didn’t work unfortunately.
Firmware 1.4 also lets you nest folders in the ‘Multi-sampled Instruments’ folder which I found interesting, several folders deep too, and the order of the multisample selection list takes the folders into account, but flattens their contents to a single list - I’m hopeful this is the seed for proper folder support on the drum and multi preset lists 