I built a cabinet on wheels (casters actually) that is about 3 feet wide, 2 feet deep, and about 5 feet high, out of plywood with a base made with 2x6s. There are three shelves, with one that is just the right size for the tour pac. I put aluminum angle stock on the shelf, so I just set bracket on the the angle stock "track" and it keeps it centered in the shelf. I also put a sturdy hook on the side for hanging the seat.