It's not possible to put two Fusions' metal components together, because the parts are held in place by a series of fins on the metal side that slide into a series of holes on the rubber part.
However, you can probably take two of the rubber parts and have them held together by the Clear Wheel and the metal core, since the holes won't interfere like the fins do.
However, you can probably take two of the rubber parts and have them held together by the Clear Wheel and the metal core, since the holes won't interfere like the fins do.