That would be Legen "wait for it" dary by Ripster's "Weight Theorem: Build Quality is Directly Correlated To Weight of Keyboard" standard
In that case, we should probably just jump to depleted Uranium! I don't think the filco-style top case would work in stone, it would have to be thicker, or directly supported by the PCB. It might be feasible (and by feasible, I mean totally ridiculous but technically possible) to put every key cluster(home cluster, arrow cluster, F9-12, etc...) on a separate "Island" pcb, and just connect them with cables, allowing each of the case-top dividers to be as thick as needed.
Back on topic, though, the "wood" filco reminds me of a background texture stolen from somebody's Geo Cities page.