Nice idea BUT ...
This is ClasicComp where many of us pay storage fees
to keep old computers from the scrapper.
With that in mind, just how many old laptops would
have to give their lives to complete the project at
1 segment
per laptop.
You can buy them surplus, new, without having to kill
a single laptop. I bought a box (50) to play with
about a year ago. Also, I got 8 really nice ones from
a broken desktop monitor, had a cracked screen. They
are almost 14" long with inverters for every two
tubes.
Bob