Make crafts truly reuseable

Right now, it is possible to make crafts that can have the first stages return to the space center, or other reusable crafts like an SSTO, but unless we find a way at refuel them and attach them to a rocket (if necessary) without the designer, we cannot truly reuse crafts or craft parts. An idea would be that in the map, you could click on the craft and there would be a “reuse” option, and if you click that the craft would go into a new parts category in the designer called “used crafts” and there would be the crafts that you want to reuse in there, and you could build them into any craft, and they would still have any heat damage they took, and still have any fuel left in them after the flight. Also, when you build them into a craft, they are not included in the total price of the craft