Just my 2 cents on this. We place strategically cut pieces of clear stairway runner on our carpet for cleanup and preservation reasons. The piece that covers the carpeted area between the
front seats gets surprisingly wet underneath when driving. I always lift and let it dry at the end of the day. Not doing so might cause the trapped moisture over time to promote mold which is
never welcome.
10-4 on that!! Discussing 'Entombing' the carpet up front with the PVC liner, spraying it (and letting it dry) with a mold/mildew inhibitor like
https://www.homedepot.com/p/Concrobium-32-oz-Mold-Control-025326/100654126(I do NOT work for Home Depot, but they are SO damn handy...

)
The dried residue will be 'reactivated' with water should a leak/condensate cause a problem.
Did a little more on the floor today, and am behind on pics.

Lets GO!
Pic 9097 shows the heads of the carriage bolts that will hold the battery pack.
Pic 9098 show the studs poking down under. I have since added 1 3/4 washers, lockwashers and nuts to secure them. This leaves ~ 1 1/4 inch of thread to mount the battery support system.
Pic 9099... a map. I am going to be installing a trim piece over the edge of the flooring, secured by screws. There are already screws there to hold the step in place. I do *NOT* want to try to put the trim screws where they are.

So I made a map of where they were, using the wall and cabinet as reference points. Now I can place my trim screw holes with confidence.

I made a similar map to chart the four holes in the floor for the table. We did not find the table useful, and will not be putting the floor brackets back in. We might want to later, so i made a map that goes into the RV record book.
Pic 0102 - It looks great.

Still more trim to go up, but the big picture is clear.

pic 0118 - fitting up the stair trim. It is gonna look GREAT!
