Hi Ryan - relatively easy job. Remove cover by removing wood screws. Under it there is a block screwed to the hatch that you remove to slide the hatch free. Then more screws to remove the track. There's wood - looks like plywood - inside the raised deck. Mine had some moisture. I wanted to make the job bigger so I drilled large (e.g., .5") clearing holes down to intersect the horizontal screw holes (and also where the vertical cover screws were placed) and dried and filled w/epoxy. Don't know if 5' is enough (I did all this for fun - didn't need to replace track). If you skip the epoxy and just caulk, can easily do in a couple hours.
