Has anyone built a vacuum table

I see some references to vacuum tables on the forum (many seems to aspire…), but has anyone gotten to it and built one? Any experiences to share before I venture into it? I’m getting inspiration from https://www.youtube.com/watch?time_continue=9&v=fOrkvPF0pro
https://www.youtube.com/watch?time_continue=9&v=fOrkvPF0pro and instead of building a solid top plate using my two 36x36 .75’’ MDF, I’m thinking of offsetting the two plates a couple of inches, add inner structure and perforate the top plate accordingly.