Steve,
It sounds like your floor is like the floor in a Suburban (but without the pockets for the seat bolts).
What you describe for removing re-installing a floor is the only way that I have seen/heard that works if you want to use a single piece of plywood.
For previous discussions on this topic, use the "search" option that is under "Post a Reply" near the top of this page. Search for "floor" in this forum.
The Canopy Express is not a common model - it is nice to hear that you are restoring it to look original. Post pictures every so often.
Tim
