rockwork

Quick question: I'm setting up a Mbuna tank and I'm worried about pressure points when I put all the rocks in. I have read on here about using styrofoam underneath the rocks and substrate (which will be PFS) on the inside of the tank. The only goal is to make sure I don't create pressure points...

Just wanted to show off my mbuna 125, and maybe spark some ideas for other fish keepers getting into African rift lake setups. I just added 4 new mbuna, so I did another rescape today. The look I'm going for is a part of lake Malawi I saw in a video that had fallen logs, driftwood, a few plants...