I really don’t know what to advice you here - an extra daisy would be nice offcause, but the legio should be enough.
I don’t know if they use the seed or the patch-sm
It doesn’t come with schematics (and I asked, but they kindly refused to give it away - for versio at least), so perhaps it’s not easy to “clone” it on a breadboard if you get a daisy seed for development. Maybe it’s obvious from looking in the source-code how things are wired … I haven’t looked - I usually stay away from modules that I don’t have the schematics for.
All you have is the pin numbers here.
If you think you need one for development, buy 2x legio.
If you want to tinker, add your own pots, switches, leds, display etc, without risking the legio … perhaps get the Daisy Pod when it’s avaiable again.
Or patch.Init() — Electro-Smith
or wait - see this