Fusion requires very strong superconductors. Those can be made from plastic, according to some old patents. The critical temperature of this material far exceeds the decomposition point of the plastic, 1000 degrees K.
If you put all the pieces together, you should be able to pull off Boron 11 fusion in a manner similar to the Polywell, and extract most of the energy directly as high voltage DC.
You could then use that high voltage DC to power a field effect lifter.
That's my guess at the how fusion could be magic. Extrapolated from spending way too much time surfing the web.
One day I want my own personal Megawatt box powered by this technology. It should be about the size of a 2 drawer filing cabinet with a small display for setting the output parameters, and a set of 480, 220, 110, 12 volt, and USB-C outputs.