That's not recasting, they used those parts, modified them, glued them to each other to create a new thing.
If you use let's say an X-Wing fuselage from a studio scale kit, modify it and build whatever you want out of it, an artistic render of the Eiffel Tower, a dragster or anything else, and you make it as a kit, I dont think you will be called recaster as you used it as you would use PVC pipe, stock styrene or anything else that you have transformed into something new.
Recasting is when you mold and cast something and that the final product is the same. I mean a recast is a (usually bad) copy.
