So just to clarify a few questions. If I am medium and move 2 spaces normally, 4 spaces on a sprint, does this change moving to medium-heavy? The thrusters on my pack move me 3, this is in place of regular movement, I assume, is that usable only once per turn, or can I sprint with it too for a total of 6 spaces?

The shield barrier, is there a recharge period if it breakdown, or is when it's done it's done?