Here's a couple extras! The first is a drawing with all the measurements for the single piece plywood deck I built. And these measurements were corrected to fix the errors I described earlier. Naturally these were for my vehicle so there's no guarantee they'll match yours if you want to try this build. But it should be close if you have a LWB Wagon.
The second is a quick diagram and explanation I had for some alternate ways of doing the job that occurred to me during the build. My initial thought was for a smooth, strong and flat floor from a single continuous sheet. But you can get a bit more coverage, 57" wide at the doors instead of 48" wide, if you are willing to have a cut joint in the middle of your floor. It was also starting to become a pain every time I had to install and remove the single panel for the numerous trials and modifications. A narrower folding floor, 26" wide when folded with hinges, can be made in 3 pieces to make frequent installation and removal much easier. Unfortunately, it will also require a second (half) sheet of plywood. I tried and just couldn't seem to get all 3 pieces to pattern onto a single 4x8 sheet if you want the full 57" width at the doors.
They are in PDF format for most universal viewing. That's part of the reason for the delay in posting this thread. It took a week to try to learn the DraftSight program well enough to produce a useful drawing.
Transit Connect Floor Alternate Ideas.pdf
Transit Connect Floor Dimensioned.pdf
But if you want the CAD drawings I generated for these, PM me an email address to send them to.
I tried to upload the .dwg files but the forum wouldn't allow it.
Update: Found an error in the files orignally posted. Fixed the error and posted new corrected files.