The panel overhanging the stairwell opening before being cut.

Bob cuts the panel surrounding part of the stairwell.

Applying adhesive before setting another panel.

Jeff trims about 1/4 inch off the edge of the scribed panel around the NW GSL so that it falls on the center of the floor joist.

Bob holds another panel before Jeff applies the adhesive to the joists.

Trimming the last panel for the day.

To prepare for the work on the center RPSLs, Bob and Jeff built a movable deck out of planks and 3 sheets of OSB. This will be used for a temporary floor over the middle area that doesn't have permanent panels laid yet, and can be positioned as close as needed to either RPSL.

They also covered part of the stairwell for safety. At this point, you can pretty much walk all around the first floor on immovable paneling.