Biobuster

can I use the special rules for the experimental droids battle force (Get 3 surge tokens on commanders card, other units spend them to gain bones) with a promoted droid trooper commander? same question with "Orbital strike" command card. does this only apply to original droid trooper commanders, or if they are defeated does it work with a promoted droid trooper commander?

The special Rules for the Experimental Droids Battle force add 3 surge tokens to a chosen commander's "card" and then allow your other units to spend surge counters off your chosen commander in order to get a selected benefit. This brought up two questions: 1. if you add additional surge tokens to your commander (bolster, command card, or aggressive tactics), can those also be spent to get the benefit? or can you only spend the 3 original surge tokens in this way? 2. on the other side, can the commander use those 3 surge tokens to convert surges? or are they somehow different since they were added to the units card rather than the unit?