i have an easier way of doing this, for each recovered vehicle, the parts that comprised that vehicle are dis-assembled and credited individually, now that the vehicle is recovered, next time you enter the VAB,you get a credit that discounts cost the next time you use that same part type. if you recovered 2 large solid rockets, then in the VAB, next time you build a ship, you have 2 discount credits for the large solid rocket part. if you recover an orbital crew transfer vehicle, the engine, fuel tanks, crew pod, antennae, and anything else that was attached to it are now dis-assembled and discount credits are now applied for each exact part type in the VAB. so if you build the same crew transfer vehicle, if you use the same parts and duplicate the ship, you can use all the discount credits that the last ship got you. and you now have re-used a whole ship. hopefully i made that clear enough lol