FWIW, I was about to make the same note, and there’s more discussion about that in the thread now - the Tracker draws less than 500mA so it should be safe to power from Norns or any standard USB port supplying enough current in that regard. That’s in the same realm as Grid with everything on, I guess.
(It’s really pretty remarkable how little power the Tracker draws, it can practically run days on a 23 000 mAh power bank…)