depends what car its going in to....the box i have house 1 12, i have to lift the board up along with the box to get the tools out, and probably have to take the box out to get the spare. this is in a sedan. but i do have a strut bar that prevents me from pushing the box all the way back.

i never really listened to MTX, but people rave about the 8000s.

you should think twice about bolting your box down.