This is just an FYI tip for future prospective A/S trailer owners. I have read a few issues with relatively new trailers having leaks and rot issues with the OSB or plywood flooring.
I have a 1983 310 turbo diesel that required a complete redo of the floor in the rear convertible lounge. I decided to use a composite marine sheet called Coosa composite board, specifically their Bluewater 20 density sheets. These sheets are 45% less in weight than the equivalent thickness in plywood.
Since they have a number of fibreglass mattings laid throughout the sheet, the material is exceedingly strong, impervious to moisture and very easy to machine. Yes the're more expensive than marine plywood $255 CANADIAN versus $155 for a sheet of #1088 Meranti marine ply, but how much is piece of mind knowing that no matter where or how the water gets in.......it won't ever rot, mildew, smell or mold......ever. Considering you're paying $50,000++++ for a new trailer, what's another $1,000 or so and it's LIGHTER than ply to boot (saves gas).
If I was to order a trailer from A/S, I would deliver the Coosa sheets myself or have them delivered to the factory and INSIST they use them. Hopefully A/S will see the light and use composites in their flooring.
Guaranteed you will recoup the extra expensive should you decide to sell the trailer. What would you rather buy used.....rotted OSB or an A/S Coosa trailer????