GF recently redid their concept, because the previous one wouldn't work (magnetic fields were far too high, which would cause liquid metal to vaporize off the plasma facing surfaces, hopelessly contaminating the plasma). The new concept uses slower compression, and has a solid metal conductor down the middle of the chamber. This conductor would experience enormous neutron loading (it cannot be shielded from that by a thick layer of liquid metal) as well as enormous forces from magnetic fields up to 100T.

I give this scheme very little chance of being workable.