Hi Dan,
I'm downloading the mod now, will try it out and give you some feedback on it later.
Edit: I didnt want to double post, so I'm just adding my first comments here.
Could you please include a Readme in the download that gives basic instructions for using the mod?
I'm going back to Minetest now to build a new house and continue trying out your mod.
Edit 2:The mod does seem to be useful for both floors and other things.
I tried stone, desert stone, default wood, jungle wood, sandstone and sandstone brick flooring. They all seem to work as intended. If you could place other blocks up against the flooring on both the bottom and top that would be wonderful,but I suspect that isnt possible in minetest. I'll try using the screwdriver tool on flooring and see what happens.
Here is a screen-shot of a plant stand on the desert stone floor mod floor.
The floor, and the shelves in the plant stand are both made using flooring panels from your mod.

I cropped and scaled-down the screen-shot to try and make it fit the forum page a little better. Hopefully it will give you a general idea of how the flooring looks.
Edit 3: Just as an experiment I tried the screwdriver tool on the flooring, but it had no effect.
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