- A participant proposed a novel mechanical route to reach the 170 GPa pressure required for room-temperature superconductivity in lanthanum hydride by exploiting the thermal expansion of steel.  
- The concept involves nesting progressively heated steel cylinders around a chilled, powder-filled lanthanum-hydrogen rod, using differential thermal expansion to generate extreme static pressure without hydraulic apparatus.  
- Because the ends would be sealed, the resulting superconducting rod could not serve as a power-transmission line, but the Meissner effect could enable contactless magnetic levitation or other compact superconducting devices.  
- The discussion highlights an open-source, garage-scale approach to high-pressure physics, suggesting that creative use of common materials (steel and temperature cycling) might bypass the need for diamond-anvil cells or large presses.