: I have used a long piece of 1"x1" wood with a hacksaw
: blade attached to one end. Attach the hacksaw blade so that it
: cuts when your on the pull stroke. I would cut the rib off in
: any area where Its coming close to the skin.

I would definitely cut the ribs that are threatening the skin, but the #3 rib also looks to be stressed so some rib replacement or reinforcement seems to be called for. Preferred approach would be through the deck I imagine; to avoid a visible patch perhaps this would be a good time to think about a hatch . . .