For the experimental droids surge token ability, it says to choose a commander at the beginning of each activation phase to put the surge tokens on its unit card. It goes on to say that during a unit's activation, it may free action spend a token from the "chosen" commander. If I have a second commander unit that I have chosen a previous turn to have placed surge tokens on per the ability, and did not spend them all so they remain the next turn, can a unit still spend surge tokens from it, or would I be unable to as it is not the "chosen" commander for that turn?