"Cockpits could be a straight swap but a swap of heads again would unlikely to be effective.MaxTech (and I think some later rulebooks) deals with salvaging destroyed components (10+ on 2d6 means the component can be repaired and thus salvaged including locations, engines what have you) but expendible stuff like armour cannot be salvaged.In an early book, I believe it was the 3055 Mercenary Handbook" . . . .