We have patio that's mostly concrete but has a brick area too. The concrete is fine, but the brick has settled in some places / low spots. We'd like to put a hot tub on the concrete portion, but it's about 4" too narrow (at least for an 8' spa). Would it be bad if the hot tub is mostly on the concrete pad, but 4" is sitting on the bricks? Would it help if I added a pad / pavers over the whole area?