I made some sturdy VFLATs for my photo studio from thick Styrofoam boards and 3d printed parts without using any tape – LOL. They came out great!

The folding screen hinges are for 30mm thick Styrofoam boards. Thinner Styrofoam boards with 2 meters in length would be too wobbly. And yes the d=4mm x 40mm long wood screws hold pretty well in “quality” foam boards. I did a test prior to starting this project and was surprised how well they hold. I also use 5 screws on each side of the hinge in case I'm a little rough with the VFLATs.

White styrofoam boards 2000x1000x30mm
Black matte, acrylic water based paint
Paint roller
Woodscrews d=4mm x 40mm
3D printed folding screen hinges
3D printed corner protectors
Pieces of 1.75mm filament as shaft

All infos and many more pics on my blog:
https://www.schweinert.com/diy-studio-vflats/

UPDATE:
2022-02-28 I just added a version for 1 inch (25,4mm) thick Styrofoam boards for our American friends ;-) Happy printing!