Hi Maya,
You can get a lot of answers out of our published papers. Forces have to be balanced, but not pressures. A DPF generates enormous pressures through the pinch effect, concentrating currents in the tiny plasmoid. The hundreds of MG (mega-gauss ) fields already observed are far above those that could be generated by a magnet. But pressures applied on tiny volumes require only modest forces. And the forces are only applied over very short periods of time–in our machine a few microseconds. (Our machine’s vibrations do have an inconvenient ability to unscrew just about anything! We are therefore elimanting screws.) As for neutrons, a future DPF gnerator would produce 5MW of net power from about 12 MW of total fusion power. Neutron power from secondary reactions will be only around 24 kW and in the form of low-energy neutrons that do little damage.