Each of the foam pieces individually fits the Q0 perfectly. However, due to the thickness of the foam, one can only use the plate foam with either the PCB foam or the case foam. It is not possible to use all three foam pieces together. There is not enough depth in the case to allow for use of the third piece of foam. The problem is a third piece of foam in the stack elevates the board such that the USB port cannot fit through the hole in the aluminum case properly. Neither trimming the top of the case foam with a cut out for the USB socket nor top section of the case foam was sufficient. I opted for using just the PCB foam since it has cutouts for the hot swap sockets on the PCB. It still torques the USB port some, but the effect is minimized once the switch plate is screwed in place. The sound is improved over stock, so I am still happy with the result. It would have been nice to have been advised that one must choose either the PCB or case foam in the description.