I had been out of 40k since 3rd (sold armies, etc), then some buddies got back into it 10+ years ago. Not having the funds at the time, I built an army from shrink-film.
I had to print out images to trace and do the maths so the final result was passable. This is why I made a conversion ruler (original length in blue, final size in red).
I never got around to vehicles or walkers, but I was designing some slot-together bits.
These are neat. Very in line with the old cardstock Ork walker from the 2e box, and from cardstock placeholder stuff generally.
If you want to PM me I’d be happy to put these up on my site. Some clean scans of the drawings and some more beauty shots would be great.